Missing test coverage for spatial search for un-indexed and no-doc-values

[craigtaverner]

Currently test coverage for spatial search for spatial types that are not indexed and/or have no doc-values is untested.

For example:

{
  "properties" : {
    "point": { "type" : "geo_point",  "index" : false, "doc_values" : false }
  }
}

An appropriate place for testing this would be a file like 130_spatial.yml, or a new one close to that like 131_spatial_dv.yml.

We should test combinations of:

• Simply reading fields
• Using spatial search functions with lucene push-down
• Using spatial search functions without lucene push-down (eg. after stats or some other blocking command)
• Using spatial aggregations (like ST_CENTROID_AGG) that trigger reading from doc-values
• Combined with index:false, doc_values:false and both false

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)