Merge pull request #20546 from yehudasa/wip-rgw-gc-aio

rgw: gc use aio

Reviewed-by: Matt Benjamin <mbenjamin@redhat.com>

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

diff --cc src/common/legacy_config_opts.h
Simple merge

diff --cc src/common/options.cc
Simple merge

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

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