Automatic merge from submit-queue E2E & Node E2E: Improve node e2e test framework This is first part of https://github.com/kubernetes/kubernetes/pull/29494. I split #29494 into several PRs to help review. For https://github.com/kubernetes/kubernetes/issues/29081. This PR changes TestContainerOutput to use the framework pod client:** so that all test using `TestContainerOutput` could be shared automatically. For example: https://github.com/kubernetes/kubernetes/blob/master/test/e2e/configmap.go#L198 @vishh @timstclair /cc @kubernetes/sig-node