Update SLRFVM forecast aggregation to UGRID 0.9 conventions

 I upgraded  the SLRFVM forecast aggregation GLOS aggregations to UGRID 0.9 conventions and added the global attribute  `<attribute name="cdm_data_type" value="any"/>` that will allow ncISO to properly compute the geospatial coordinates.   If this works well, I (or somebody else) can add the same content to the rest of the datasets.