Take observed generation of deps into account

To prevent operations from being performed while they are "Ready",
but the latest generation of the depenceny has not been reconciled
yet.

controllers/kustomization_controller.go

@@ -713,7 +713,7 @@ func (r *KustomizationReconciler) checkDependencies(kustomization kustomizev1.Ku
 			return fmt.Errorf("unable to get '%s' dependency: %w", depName, err)
 		}
 
-		if len(k.Status.Conditions) == 0 {
+		if len(k.Status.Conditions) == 0 || k.Generation != k.Status.ObservedGeneration {
 			return fmt.Errorf("dependency '%s' is not ready", depName)
 		}