[DOC] Documentation for GRPC APIs in 3.3 release

[karenyrx]

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.
Update https://docs.opensearch.org/docs/latest/api-reference/grpc-apis/index/ for OS 3.3 release

Version: List the OpenSearch version to which this issue applies, e.g. 2.14, 2.12--2.14, or all.
3.3
What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
Related issue for 3.2: #10556