[Remote Store] Support repository registration during node bootstrap

[psychbot]

Is your feature request related to a problem? Please describe.
Today we supports the registration of a repository via Put API call. But with remote backed storage we want all the indices to be remotely backed including system indices which essentially means that the repository registration has to be part of node bootstrap for system indices to be backed to remote store.

If the repository is not available during the bootstrap and the Opensearch cluster has the remote backed storage enabled will result in system indices being red.

Describe the solution you'd like
We would want to pass the repository information as part of yml file such that during the node bootstrap itself the repository gets registered.

Expected yml content

repositories: 
    my-fs-repository:
        type: "fs"
        location: "/mnt/snapshots"
    my-opensearch-repo:
        type: "s3"
        bucket: "bucket_name"
        region: "us-west-2"

[dreamer-89]

@psychbot : Will this issue be fixed with #8623 ? If yes, do you mind closing this issue in favour of #8623. If this is unrelated to #8623, then we needed your attention on this as this is targeted for 2.10.0 release and this is needed before we can test end-end (specially plugins) with remote store.

[psychbot]

@dreamer-89 Yes, this can be closed in favour of #8623