[Feature Request] [Remote Store] Make metadata store independent of data store

[sachinpkale]

Is your feature request related to a problem? Please describe

• Currently, when we configure remote store for a cluster, both data and metadata (of segment, translog and cluster state) is stored in the same store.
• But the access pattern and consistency requirements for data and metadata are different.
• For example, data files are uploaded and downloaded by providing a filename whereas metadata is fetched based on certain characteristics such as recency.
• Due to these differences, it is possible that metadata can be stored in a different data store (for example, a key-value store) as we store the data files in a blob store.

Describe the solution you'd like

The ideal solution should allow configuring a different remote store for metadata.

Related component

Storage:Remote

Describe alternatives you've considered

No response

Additional context

No response