Geospatial support in ES|QL: Hash, Tile, and Hex Support for geo_shape

## External Product Outcome Title for Q3
Hash, Tile, and Hex Support for geo_shape in ES|QL

## External Product Outcome
Having a query language that is simple to learn and use simplifies the usage and the learning curve, saves time, and reduces cost. ES|QL brings all of that in addition to new capabilities like joins. Geo users now enjoy in ES|QL the majority of query functionality that they have been using in DSL, i.e. users can perform all the geo searches and geo aggregations in ES|QL, and benefit from ease of use that the piped query language offers. As part of that effort we are adding support for geo_shapes, for the grid searches and aggregations: geohash_grid, geotile_grid, and geohex_grid enabled in ES|QL by ST_GEOHASH, ST_GEOTILE and ST_GEOHEX respectively.