Merge pull request #64205 from rishabh-d-dave/wip-71854-squid

squid: mgr/vol: include group name in subvolume's pool namespace name

diff --cc PendingReleaseNotes
Simple merge

diff --cc doc/cephfs/fs-volumes.rst
Simple merge

diff --cc qa/tasks/cephfs/test_volumes.py
Simple merge

diff --cc src/pybind/mgr/volumes/fs/operations/versions/subvolume_base.py
Simple merge