Fix ceph_mds_metadata:count recording rule

We incorrectly used `ceph_mon_metadata` instead of `ceph_mds_metadata`
in the recording rule expression.

Author: simu

class/defaults.yml

@@ -220,7 +220,7 @@ parameters:
         "record:rook_ceph_operator_images:count":
           expr: count by (image) (kube_pod_container_info{namespace="${rook_ceph:namespace}"})
         "record:ceph_mds_metadata:count":
-          expr: count by (ceph_version) (ceph_mon_metadata)
+          expr: count by (ceph_version) (ceph_mds_metadata)
         "record:ceph_mgr_metadata:count":
           expr: count by (ceph_version) (ceph_mgr_metadata)
         "record:ceph_mon_metadata:count":

tests/golden/cephfs/rook-ceph/rook-ceph/40_alertrules.yaml

@@ -843,7 +843,7 @@ spec:
             severity: warning
             syn: 'true'
             syn_component: rook-ceph
-        - expr: count by (ceph_version) (ceph_mon_metadata)
+        - expr: count by (ceph_version) (ceph_mds_metadata)
           record: ceph_mds_metadata:count
         - expr: count by (ceph_version) (ceph_mgr_metadata)
           record: ceph_mgr_metadata:count

tests/golden/defaults/rook-ceph/rook-ceph/40_alertrules.yaml

@@ -843,7 +843,7 @@ spec:
             severity: warning
             syn: 'true'
             syn_component: rook-ceph
-        - expr: count by (ceph_version) (ceph_mon_metadata)
+        - expr: count by (ceph_version) (ceph_mds_metadata)
           record: ceph_mds_metadata:count
         - expr: count by (ceph_version) (ceph_mgr_metadata)
           record: ceph_mgr_metadata:count

tests/golden/openshift4/rook-ceph/rook-ceph/40_alertrules.yaml

@@ -843,7 +843,7 @@ spec:
             severity: warning
             syn: 'true'
             syn_component: rook-ceph
-        - expr: count by (ceph_version) (ceph_mon_metadata)
+        - expr: count by (ceph_version) (ceph_mds_metadata)
           record: ceph_mds_metadata:count
         - expr: count by (ceph_version) (ceph_mgr_metadata)
           record: ceph_mgr_metadata:count

tests/golden/rbd-extra-storageclass/rook-ceph/rook-ceph/40_alertrules.yaml

@@ -843,7 +843,7 @@ spec:
             severity: warning
             syn: 'true'
             syn_component: rook-ceph
-        - expr: count by (ceph_version) (ceph_mon_metadata)
+        - expr: count by (ceph_version) (ceph_mds_metadata)
           record: ceph_mds_metadata:count
         - expr: count by (ceph_version) (ceph_mgr_metadata)
           record: ceph_mgr_metadata:count