[Feature] GeoTileGrid Aggregation on Geo Shape field

[navneet1v]

Description

This issue tracks the implementation of GeoTileGrid Aggregation on Geo Shape field.

Tasks:

• Refactor code of GeoTileGrid Aggregation on GeoPoint from server to modules/geo folder.
• Implement the GeoHashGrid on GeoShape field
  • Implement the code to find the intersection with the tiles and return the results in correct bucket.
  • Integration Tests
  • Unit Tests

Dependency

#4049

Useful Links

1. RFC for All Aggregations on GeoShape: [RFC] - Implement Aggregations on Geo Shape Field geospatial#84
2. Low Level Implementation Proposal: [Proposal]: Low Level Implementation Details for Geo Shape Aggregation and future Geo related Features geospatial#92
3. Enabling Doc values for GeoShape: Enable Doc values for GeoShape Field #4049
4. All Aggregation Implementation issue: Implement Aggregations on Geo Shape geospatial#104
5. [RFC] - Geo Tile Grid Aggregation on Geo Shape Field geospatial#195