Merge pull request #58179 from cbodley/wip-rgw-assert-async

rgw: test that no asio threads are blocked on null_yield

Reviewed-by: Adam Emerson <aemerson@redhat.com>

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

diff --cc src/rgw/CMakeLists.txt
Simple merge

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

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