Merge pull request #64173 from mtaufen/node-e2e-dynamic-config-helper-fix

Automatic merge from submit-queue (batch tested with PRs 63830, 63579, 64173). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

fix the e2e node helpers that let tests reconfigure Kubelet

The dynamic config tests were updated with the validation change, but
the tests that try to use dynamic config via this helper were not.

Should fix the failures here: https://k8s-testgrid.appspot.com/sig-node-kubelet#kubelet-serial-gce-e2e

```release-note
NONE
```

test/e2e_node/util.go

@@ -172,7 +172,6 @@ func setKubeletConfiguration(f *framework.Framework, kubeCfg *kubeletconfig.Kube
 		ConfigMap: &apiv1.ConfigMapNodeConfigSource{
 			Namespace:        "kube-system",
 			Name:             cm.Name,
-			UID:              cm.UID,
 			KubeletConfigKey: "kubelet",
 		},
 	}