[DOC] The parameter field and target_field in KV ingest processor now supports template snippets

[gaobinlong]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request and all versions that are affected.

The parameter field and target_field in KV ingest processor will support template snippets in 2.12, we need to add this enhancement to the documentation. I see that currently we don't have documentation for kv processor, so please include this change when we add the documentation.

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
opensearch-project/OpenSearch#10040

[reta]

FYI, the target is 2.12.0

[hdhalter]

Thanks, @gaobinlong and @reta ! Who will be writing the documentation for this feature?

In the meantime, I've asked @vagimeli to prioritize on the kv processor, since she is working on the processor documentation currently.

[reta]

Thanks, @gaobinlong and @reta ! Who will be writing the documentation for this feature?

I believe the author of the change (@gaobinlong) should be writing it

[vagimeli]

@reta @gaobinlong See PR ##5781. Content in progress. I'll tag you both when it's ready for your review.

[gaobinlong]

Close this issue as the related PR has been merged yet.

[hdhalter]

@gaobinlong - Does the merged PR contain the information being delivered in 2.12? I believe 5781 was written based on 2.11, but just want to confirm. Thanks!