[FEATURE] Support Well-Known Text Geoshape

[RobSaxonNokia]

Is your feature request related to a problem?
The documentation shows that geopoint may be in many formats. One such format I used is WKT [Well-Known Text]. This is currently in use for my project. However, when I tried to use the Observability features, an error message was generated stating my geopoint was not valid and only the format "{ "lat": number, "lon": number }" is supported.

What solution would you like?
Support WKT and other valid formats for geo points / geo shapes.

What alternatives have you considered?
I would need to redo my design to change all WKT uses to the one format supported.

Do you have any additional context?
Overall, if possible, have a consistence use of fields like geo-shape.

[joshuali925]

i believe the problem is lack of support of WKT in sql/ppl engine, i'll move the issue there

[dai-chen]

@RobSaxonNokia We may need to cover different common format in https://github.com/opensearch-project/sql/blob/main/opensearch/src/main/java/org/opensearch/sql/opensearch/data/value/OpenSearchExprGeoPointValue.java. We will look into this issue. Thanks!

[dai-chen]

Examples: https://opensearch.org/docs/2.6/field-types/geo-point/