Update leader election role to leases.coordination.k8s.io

- controller runtime 0.7 has changed leaderlock from
ConfigMap to ConfigMapsLeasesResourceLock

Author: ChunyiLyu

Diff for: config/rbac/leader_election_role.yaml

@@ -18,9 +18,9 @@ metadata:
     app.kubernetes.io/part-of: rabbitmq
 rules:
 - apiGroups:
-  - ""
+  - coordination.k8s.io
   resources:
-  - configmaps
+  - leases
   verbs:
   - get
   - list
@@ -29,14 +29,6 @@ rules:
   - update
   - patch
   - delete
-- apiGroups:
-  - ""
-  resources:
-  - configmaps/status
-  verbs:
-  - get
-  - update
-  - patch
 - apiGroups:
   - ""
   resources: