mds: fix mds liveness probe

mds liveness probe call ceph cmd with mons and keyring,
but ceph actually looks for the ceph keyring at default folder
first and then use the cmd line keyring path,
So to avoid that use ceph_args env variable to expose the keyring
folder path,
Workaround for https://tracker.ceph.com/issues/70167

closes: https://github.com/rook/rook/issues/15373

Signed-off-by: parth-gr <partharora1010@gmail.com>
(cherry picked from commit 0999cf9b56)

pkg/operator/ceph/file/mds/livenessprobe.sh

@@ -7,7 +7,8 @@ FILESYSTEM_NAME="{{ .FilesystemName }}"
 KEYRING="{{ .Keyring }}"
 CMD_TIMEOUT="{{ .CmdTimeout }}"
 
-outp="$(ceph fs dump --mon-host="$ROOK_CEPH_MON_HOST" --mon-initial-members="$ROOK_CEPH_MON_INITIAL_MEMBERS" --keyring "$KEYRING" --connect-timeout="$CMD_TIMEOUT" --format json)"
+export CEPH_ARGS="--keyring $KEYRING" # workaround for https://tracker.ceph.com/issues/70167
+outp="$(ceph fs dump --mon-host="$ROOK_CEPH_MON_HOST" --mon-initial-members="$ROOK_CEPH_MON_INITIAL_MEMBERS" --name="mds.$MDS_ID" --connect-timeout="$CMD_TIMEOUT" --format json)"
 rc=$?
 if [ $rc -ne 0 ]; then
     echo "ceph MDS dump check failed with the following output:"