Add LH coredns permission to access Submariner resource

Addresses
https://github.com/submariner-io/lighthouse/issues/936#issuecomment-1416197295

Also removed the permissions for the obsolete lighthouse.submariner.io
group.

Signed-off-by: Tom Pantelis <tompantelis@gmail.com>

submariner-operator/templates/rbac.yaml

@@ -879,21 +879,11 @@ rules:
       - update
       - delete
       - deletecollection
-  - apiGroups:
-      - lighthouse.submariner.io
-    resources:
-      - "*"
-    verbs:
-      - create
-      - get
-      - list
-      - watch
-      - update
-      - delete
   - apiGroups:
       - submariner.io
     resources:
       - "gateways"
+      - "submariners"
     verbs:
       - get
       - list