chore(plugins,remove-finalizers): make sure the resources api group is respected (derailed#2926)

I had an issue where RabbitMQ created a CRD called `policies`, but
Kyverno also did and the finalizer removal did not hit the RabbitMQ CRD.

Author: jonasbadstuebner

plugins/remove-finalizers.yaml

@@ -25,7 +25,7 @@ plugins:
       - $CONTEXT
       - --namespace
       - $NAMESPACE
-      - $RESOURCE_NAME
+      - $RESOURCE_NAME.$RESOURCE_GROUP
       - $NAME
       - -p
       - '{"metadata":{"finalizers":null}}'