Merge pull request #30650 from athanatos/sjust/wip-dmclock-server-only

dmclock server side refactor

Reviewed-by: Kefu Chai <kchai@redhat.com>
Reviewed-by: J. Eric Ivancich <ivancich@redhat.com>

diff --cc PendingReleaseNotes
Simple merge

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

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

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

diff --cc src/osd/OSD.cc
Simple merge