storage_service: Update config.host_id on replace
storage_service: Update config.host_id on replace

The config.host_id value is loaded early on start, but when the
storage service prepares to join the cluster to replace a node,
it will change that value (with the host id of the target). This
change only affect the system keyspace, but not the config copy
which is a BUG.

fixes: #10243

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla