[FEATURE] [GRPC][Search] Implement Term-level Query Proto Converters

[karenyrx]

Is your feature request related to a problem?

As part of feature completion of GRPC Search APIs , #16787 , implement GRPC Proto converters for term-level queries, similar to the existing query converters:

• Exists
• IDs
• Regexp
• Wildcard
• Terms set
• Prefix
• Range

What solution would you like?

1. Implement the query converter in the transport-grpc plugin
2. Verify accuracy of the spec, protobufs, and public documentation. If any fixes are needed, submit a PR to those respective repos to fix it before landing the transport-grpc PRs.

What alternatives have you considered?

N/A

Do you have any additional context?

N/A

[karenyrx]

This should be moved to opensearch core repo. Closing this issue Moved to core repo.