Change clone labels to annotations

This was causing inconsistencies because of restrictions on labels. Hence making them annotations instead

controllers/drupalsite_controller_test.go

@@ -457,7 +457,7 @@ var _ = Describe("DrupalSite controller", func() {
 				By("Expecting the clone labels to be set on the cloned site")
 				Eventually(func() bool {
 					k8sClient.Get(ctx, types.NamespacedName{Name: keyClone.Name, Namespace: keyClone.Namespace}, &cr)
-					return (cr.Labels["clonedFrom"] == key.Name && cr.Labels["clonedOn"] != "")
+					return (cr.Annotations["clonedFrom"] == key.Name && cr.Annotations["clonedOn"] != "")
 				}, timeout, interval).Should(BeTrue())
 
 				// Check if the cloneFrom field is reset on the drupalSite