[BUG] RangeRelation class removed

[fire2]

What is the bug?

The RangeRelation class was removed in https://github.com/opensearch-project/opensearch-java/pull/1697/changes#diff-3f9a4d6d34b3ee2b1cb2d00990c85c5c4d6b47564874ddcd76764c8d8aaad5cb
Why? I don't see any reason since the relation property still exists in RangeQuery but now just expects a string instead of the enum.

How can one reproduce the bug?

Use opensearch-java 3.3.0 or higher

What is the expected behavior?

The RangeRelation class exists and can be used to build RangeQuery queries..

What is your host/environment?

AWS OpenSearch 3.x

Do you have any screenshots?

Do you have any additional context?

[krisfreedain]

@reta @Bukhtawar @szczepanczykd & maintainers - can you answer this one?

Catch All Triage - 1 2

[reta]

The change that broke code generation comes from opensearch-project/opensearch-api-specification#958, I don't really understand why the is treated as a string now, but I suspect it is due to specification changes.

[reta]

Fixed by #1832