[DOC] Add Documentation for new cluster shard placement strategies

[alchemist51]

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.

opensearch-project/OpenSearch#12656 adds new setting in the upcoming release. The issue is to add documentation around the same.

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.

[hdhalter]

Thanks, @Arpit-Bandejiya. Can you please confirm that this is targeting the 2.14 release?

[hdhalter]

Hi @Arpit-Bandejiya , what is your ETA for producing the doc PR? To meet entrance criteria, the PR must be open and in review by 4/30. Thanks!

[hdhalter]

Thanks, @Arpit-Bandejiya !