Implement KRO Labels For RGD CRDs

[Gonfidel]

In relation to issue #185, we should add KRO management labels to CRD's created via ResourceGraphDefinitions.

Example label output from example/webapp/rg.yaml

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  creationTimestamp: "2025-02-08T04:53:40Z"
  generation: 1
  labels:
    kro.run/controller-pod-id: kro-pod
    kro.run/kro-version: 0.2.1
    kro.run/owned: "true"
    kro.run/resource-graph-definition-id: f25ffd07-df0c-4c7e-b90e-507c80d317fc
    kro.run/resource-graph-definition-name: webapp.kro.run
  name: webapps.kro.run
  resourceVersion: "33637"
  uid: 0e3fdd78-bafe-4bca-b44e-9cb6e23dce58

[a-hilaly]

Neat! Thanks a lot @Gonfidel !
/lgtm