Merge pull request #56597 from liangmingyuanneo/optimize-reshard

rgw reshard: optimize reshard process to minimum blocking time

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

diff --cc qa/workunits/rgw/test_rgw_reshard.py
Simple merge

diff --cc src/cls/rgw/cls_rgw.cc
Simple merge

diff --cc src/cls/rgw/cls_rgw_client.cc
Simple merge

diff --cc src/cls/rgw/cls_rgw_client.h
Simple merge

diff --cc src/common/options/rgw.yaml.in
Simple merge

diff --cc src/rgw/driver/rados/rgw_bucket.cc
Simple merge

diff --cc src/rgw/driver/rados/rgw_rados.cc
Simple merge

diff --cc src/rgw/driver/rados/rgw_rados.h
Simple merge

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

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

diff --cc src/test/cls_rgw/test_cls_rgw.cc
Simple merge