[GEO] GIS envelope validation

ShapeBuilder expected coordinates for Envelope types in strict Top-Left, Bottom-Right order. Given that GeoJSON does not enforce coordinate order (as seen in #8672) clients could specify envelope bounds in any order and be compliant with the GeoJSON spec but not the ES ShapeBuilder logic. This change loosens the ShapeBuilder requirements on envelope coordinate order, reordering where necessary.

closes #2544
closes #9067
closes #9079
closes #9080
Docs: The regexp query defaults to the `ALL` flag, and removed
the `AUTOMATON` flag which is not used in Elasticsearch.

Closes #6180