Merge pull request #20027 from Leeshine/wip-rgw-sync-bucket-shards

rgw: improve sync status: display behind bucket shards

Reviewed-by: Casey Bodley <cbodley@redhat.com>

diff --cc doc/man/8/radosgw-admin.rst
Simple merge

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

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

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

diff --cc src/test/cli/radosgw-admin/help.t
Simple merge