Merge pull request #50815 from dparmar18/wip-59262-quincy

quincy: mds: fix stray evaluation using scrub and introduce new option

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

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

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDCache.h
Simple merge

diff --cc src/mds/MDSRank.cc
Simple merge

diff --cc src/mds/ScrubStack.cc
Simple merge

diff --cc src/mds/StrayManager.cc
Simple merge