Merge pull request #51608 from vshankar/tr-61234

reef: mds: rdlock_path_xlock_dentry supports returning auth target inode

Reviewed-by: Milind Changire <mchangir@redhat.com>

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

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

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

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