Enable geo_shape queries on geo_point field types

[djptek]

Enable geo_shape query to work on geo_point fields. Add a new query processor for lon, lat point queries and modify the field mapper to accommodate add a new geo_shape mapper.

[elasticmachine]

Pinging @elastic/es-analytics-geo (:Analytics/Geo)

[djptek]

working on this

[nreese]

Hi @djptek, wanting to check the status of adding geo_shape query support for geo_point fields. Is this feature targeting 7.6?

Kibana allows users to create filters from shapes in the UI. Those filters are placed in the URL. Having to put the shape geometry into the URL can cause the URLs to be too long and prevents users from creating filters from shapes with too many vertices when querying against geo_point fields. This is a large limitation. It is also a complex error to explain to users. Allowing pre-indexed shape query for geo_point fields would greatly simplify our messaging and allow filtering to work for any shape already indexed in ES and provide good messaging to users when shape is not indexed in ES.

cc @elastic/kibana-gis

[nreese]

Here is a link to a related ES issue regarding pre-indexed query support for geo_points, #46730, for some more background

[djptek]

PR submitted for preliminary refactor post type-removal rework #50737 now working on query processor