[DOCS] Clarify remote/info and resolve/cluster descriptions

[lcawl]

Relates to elastic/elasticsearch#118993

This PR updates the remote info and resolve cluster specifications to (1) copy some missing descriptions from the docs (https://www.elastic.co/guide/en/elasticsearch/reference/master/cluster-remote-info.html and https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-resolve-cluster-api.html) and (2) incorporate the changes from elastic/elasticsearch#118993

NOTE:

1. I noticed that the examples have been removed from the old docs, so if we need to do the same in these docs, let me know!
2. It looks like cluster_credentials, which is mentioned in https://www.elastic.co/guide/en/elasticsearch/reference/master/cluster-remote-info.html, is missing from this specification.

Preview

The descriptions contain some sections, which I checked work in Bump.sh like this:

They also contain some > info callouts and external links, which look like this:

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
cluster.remote_info	🟢	3/3	3/3
indices.resolve_cluster	🔴	10/12	12/12

You can validate these APIs yourself by using the make validate target.

[lcawl]

Replaced by #3655