mgr: removing unnecessary rook-ceph-mgr rbac entries

These rbac changes were introduced as part of #11845 PR to enable
sidecar accessing mgr pods but in fact they are not necessary
as rook-ceph-mgr role had already the ability to update pods

Closes: https://github.com/rook/rook/issues/12336

Signed-off-by: Redouane Kachach <rkachach@redhat.com>

deploy/charts/library/templates/_cluster-role.tpl

@@ -99,12 +99,9 @@ rules:
     resources:
       - deployments/scale
       - deployments
-      - pods
     verbs:
       - patch
       - delete
-      - get
-      - update
   - apiGroups:
       - ''
     resources:

deploy/examples/common.yaml

@@ -793,12 +793,9 @@ rules:
     resources:
       - deployments/scale
       - deployments
-      - pods
     verbs:
       - patch
       - delete
-      - get
-      - update
   - apiGroups:
       - ''
     resources: