repair_writer: Use db from repair_meta
repair_writer: Use db from repair_meta

The caller of repair_writer.create_writer al ready
have the needed reference on database, no need to
get it from global storage_service instance.

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

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