[DOC] Update OpenSearch remote store documentation to include `node.attr.remote_store.state.repository` in bootstrapping steps

[raghuvanshraj]

What do you want to do?
The remote store documentation does not specify that the node.attr.remote_store.state.repository setting has to be added in opensearch.yml before bootstrapping the node.

• 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.

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

[hdhalter]

Thanks, @raghuvanshraj ! Will you be creating the doc PR for this update?

[hdhalter]

We do discuss the setting here: https://opensearch.org/docs/latest/tuning-your-cluster/availability-and-recovery/remote-store/remote-cluster-state/#configuring-the-remote-cluster-state

[hdhalter]

@raghuvanshraj - Does this need to be updated? If so, can you please provide the required change? https://github.com/opensearch-project/documentation-website/edit/main/_tuning-your-cluster/availability-and-recovery/remote-store/index.md. Thanks!