Raft rebuild is broken because the session id is not set.
The following was seen when run rebuild
stream_session - [Stream #8cfca940-afc9-11ee-b6f1-30b8f78c1451]
stream_transfer_task: Fail to send to 127.0.70.1:0:
seastar::rpc::remote_verb_error (Session not found:
00000000-0000-0000-0000-000000000000)
with raft topology, e.g.,
scylla --enable-repair-based-node-ops 0 --consistent-cluster-management true --experimental-features consistent-topology-changes
Fix by setting the session id.
Fixes#16741Closesscylladb/scylladb#16814