Merge pull request #18883 from cbodley/wip-22083+

rgw: set num_shards on 'radosgw-admin data sync init'

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Abhishek Lekshmanan <abhishek@suse.com>

diff --cc src/rgw/rgw_data_sync.cc
Simple merge

diff --cc src/rgw/rgw_data_sync.h
Simple merge

diff --cc src/test/encoding/types.h
Simple merge