Backport of CSI: fix prefix queries for plugin status into release/1.2.x

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #12194 to be assessed for backporting due to the inclusion of the label backport/1.2.x.

The below text is copied from the body of the original PR.

---

The CSIPlugin.List RPC was intended to accept a prefix to filter the
list of plugins being listed. This was being accidentally being done
in the state store instead, which contributed to incorrect filtering
behavior for plugins in the volume plugin status command.

Move the prefix matching into the RPC so that it calls the
prefix-matching method in the state store if we're looking for a
prefix.

Update the plugin status command to accept a prefix for the plugin
ID argument so that it matches the expected behavior of other commands.

---

I pulled this out of #12193 because this will need to be backported, whereas not everything in that PR should be.

[github-actions]

I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.