FE: correct fields sent to /sigmet2tac

When making a sigmet2tac call, irrelevant/incorrect fields are sent, causing an incorrect TAC to be generated. This blocks the smoketest from passing in https://gitlab.com/KNMI/geoweb/geoweb-serverless-backend/-/merge_requests/414. For other sigmet calls, we should check if incorrect fields are sent or not. 

If fields are empty or none, they should be stripped, except for "phenomenon", this is a mandatory field.

Irrelevant fields are (list to be checked further):
- observationOrForecastTime
- IS_DRAFT
- endGeometry (if not used)
- endGeometryIntersect (if not used)

Example of incorrect JSON sent to sigmet2tac:
```json
{
  "locationIndicatorATSR": "EHAA",
  "locationIndicatorATSU": "EHAA",
  "isObservationOrForecast": "OBS",
  "levelInfoMode": "AT",
  "change": "WKN",
  "firName": "AMSTERDAM FIR",
  "phenomenon": "SEV_ICE",
  "type": "TEST",
  "uuid": "c5b533cc-9325-11ed-b145-c63d169815aa",
  "sequence": "-1",
  "locationIndicatorMWO": "EHDB",
  "movementType": "STATIONARY",
  "validDateStart": "2023-01-13T10:06:29Z",
  "firGeometry": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [
              [
                5,
                55
              ],
              [
                4.331914,
                55.332644
              ],
              [
                3.368817,
                55.764314
              ],
              [
                2.761908,
                54.379261
              ],
              [
                3.15576,
                52.913554
              ],
              [
                2.000002,
                51.500002
              ],
              [
                3.370001,
                51.369722
              ],
              [
                3.370527,
                51.36867
              ],
              [
                3.362223,
                51.320002
              ],
              [
                3.36389,
                51.313608
              ],
              [
                3.373613,
                51.309999
              ],
              [
                3.952501,
                51.214441
              ],
              [
                4.397501,
                51.452776
              ],
              [
                5.078611,
                51.391665
              ],
              [
                5.848333,
                51.139444
              ],
              [
                5.651667,
                50.824717
              ],
              [
                6.011797,
                50.757273
              ],
              [
                5.934168,
                51.036386
              ],
              [
                6.222223,
                51.361666
              ],
              [
                5.94639,
                51.811663
              ],
              [
                6.405001,
                51.830828
              ],
              [
                7.053095,
                52.237764
              ],
              [
                7.031389,
                52.268885
              ],
              [
                7.063612,
                52.346109
              ],
              [
                7.065557,
                52.385828
              ],
              [
                7.133055,
                52.888887
              ],
              [
                7.14218,
                52.898244
              ],
              [
                7.191667,
                53.3
              ],
              [
                6.5,
                53.666667
              ],
              [
                6.500002,
                55.000002
              ],
              [
                5,
                55
              ]
            ]
          ]
        },
        "properties": {
          "centlong": 4.98042633,
          "centlat": 52.8618788,
          "selectionType": "fir",
          "FIRname": "AMSTERDAM FIR",
          "StateName": "Netherlands",
          "StateCode": "NLD",
          "ICAOCODE": "EHAA",
          "REGION": "EUR"
        }
      }
    ]
  },
  "validDateEnd": "2023-01-13T13:06:29Z",
  "status": "DRAFT",
  "observationOrForecastTime": null,
  "startGeometry": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [
              [
                5,
                55
              ],
              [
                4.331914,
                55.332644
              ],
              [
                3.368817,
                55.764314
              ],
              [
                2.761908,
                54.379261
              ],
              [
                3.15576,
                52.913554
              ],
              [
                2.000002,
                51.500002
              ],
              [
                3.370001,
                51.369722
              ],
              [
                3.370527,
                51.36867
              ],
              [
                3.362223,
                51.320002
              ],
              [
                3.36389,
                51.313608
              ],
              [
                3.373613,
                51.309999
              ],
              [
                3.952501,
                51.214441
              ],
              [
                4.397501,
                51.452776
              ],
              [
                5.078611,
                51.391665
              ],
              [
                5.848333,
                51.139444
              ],
              [
                5.651667,
                50.824717
              ],
              [
                6.011797,
                50.757273
              ],
              [
                5.934168,
                51.036386
              ],
              [
                6.222223,
                51.361666
              ],
              [
                5.94639,
                51.811663
              ],
              [
                6.405001,
                51.830828
              ],
              [
                7.053095,
                52.237764
              ],
              [
                7.031389,
                52.268885
              ],
              [
                7.063612,
                52.346109
              ],
              [
                7.065557,
                52.385828
              ],
              [
                7.133055,
                52.888887
              ],
              [
                7.14218,
                52.898244
              ],
              [
                7.191667,
                53.3
              ],
              [
                6.5,
                53.666667
              ],
              [
                6.500002,
                55.000002
              ],
              [
                5,
                55
              ]
            ]
          ]
        },
        "properties": {
          "centlong": 4.98042633,
          "REGION": "EUR",
          "StateName": "Netherlands",
          "FIRname": "AMSTERDAM FIR",
          "StateCode": "NLD",
          "centlat": 52.8618788,
          "ICAOCODE": "EHAA",
          "selectionType": "fir",
          "stroke": "#f24a00",
          "stroke-width": 1.5,
          "stroke-opacity": 1,
          "fill": "#f24a00",
          "fill-opacity": 0.25
        }
      }
    ]
  },
  "startGeometryIntersect": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {
          "stroke": "#f24a00",
          "stroke-width": 1.5,
          "stroke-opacity": 1,
          "fill": "#f24a00",
          "fill-opacity": 0.5
        },
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [
              [
                4.331914,
                55.332644
              ],
              [
                3.368817,
                55.764314
              ],
              [
                2.761908,
                54.379261
              ],
              [
                3.15576,
                52.913554
              ],
              [
                2.000002,
                51.500002
              ],
              [
                3.370001,
                51.369722
              ],
              [
                3.362223,
                51.320002
              ],
              [
                3.36389,
                51.313608
              ],
              [
                3.373613,
                51.309999
              ],
              [
                3.952501,
                51.214441
              ],
              [
                4.397501,
                51.452776
              ],
              [
                5.078611,
                51.391665
              ],
              [
                5.848333,
                51.139444
              ],
              [
                5.651667,
                50.824717
              ],
              [
                6.011797,
                50.757273
              ],
              [
                5.934168,
                51.036386
              ],
              [
                6.222223,
                51.361666
              ],
              [
                5.94639,
                51.811663
              ],
              [
                6.405001,
                51.830828
              ],
              [
                7.053095,
                52.237764
              ],
              [
                7.031389,
                52.268885
              ],
              [
                7.063612,
                52.346109
              ],
              [
                7.065557,
                52.385828
              ],
              [
                7.133055,
                52.888887
              ],
              [
                7.14218,
                52.898244
              ],
              [
                7.191667,
                53.3
              ],
              [
                6.5,
                53.666667
              ],
              [
                6.500002,
                55.000002
              ],
              [
                5,
                55
              ],
              [
                4.331914,
                55.332644
              ]
            ]
          ]
        }
      }
    ]
  },
  "IS_DRAFT": false,
  "level": {
    "unit": "FL",
    "value": 100
  },
  "endGeometry": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {
          "stroke": "#6e1e91",
          "stroke-width": 1.5,
          "stroke-opacity": 1,
          "fill": "#6e1e91",
          "fill-opacity": 0.25,
          "selectionType": "poly"
        },
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [
              
            ]
          ]
        }
      }
    ]
  },
  "endGeometryIntersect": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {
          "stroke": "#6e1e91",
          "stroke-width": 1.5,
          "stroke-opacity": 1,
          "fill": "#6e1e91",
          "fill-opacity": 0.5,
          "selectionType": "poly"
        },
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [
              
            ]
          ]
        }
      }
    ]
  }
}
```

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