repair: Keep sharded messaging service reference on repair_meta
repair: Keep sharded messaging service reference on repair_meta

The reference comes from repair_info and storage_service calls, both
had been already patched for that.

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

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