Add GeoJSON Point format support for geo_point field value formats

[talevy]

Proposal

Support GeoJSON's Point type.

Existing Support

geo_point currently supports the following formats

• "POINT(0 0)", WKT
• { "lat": 0, "lon": 0}, lat/lon object
• [0, 0], [lon, lat] array
• "0, 0", (lat, lon) string
• "gbsuv", geohash

Reason

Adding support for GeoJSON would make it easier to index the same field value as both geo_point and geo_shape when GeoJSON is preferred over WKT.

[elasticmachine]

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

[nknize]

@talevy is this related to #47535?

[nknize]

@talevy is this related to #47535?

nvm.. I just saw it in the comments.

[talevy]

yeah... it took me a second to realize these are slightly different issues, where the other issue would supersede this one if done

[imotov]

@talevy do we still want to do that?

[talevy]

I, personally, do not see why this should not be supported. That being said, the silence on this issue reflects a lack of demand for this feature...

[imotov]

I think it should help consistency. I will keep it open for now, but we can discuss it in a team meeting if needed.

[jtibshirani]

For consistency it would be great to add support for GeoJSON when indexing point fields as well.

[craigtaverner]

This work is related to #84599 and there is now even a PR at #85120