Example: $ curl -X GET "http://127.0.0.1:10000/raft/leader_host" "f7f57588-62de-4cac-9e4b-c62bfc458d91" Accepts optional group_id param, defaults to group0.
This uses the `trigger_snapshot()` API added in previous commit on a server running for the given Raft group. It can be used for example in tests or in the context of disaster recovery (ref scylladb/scylladb#16683).