Automatic merge from submit-queue (batch tested with PRs 44520, 45253, 45838, 44685, 45901)

Fix node e2e panic when not using image config file.

In https://github.com/kubernetes/kubernetes/pull/45430, `resources` field in image config is a pointer, and we only initialize it when using image config file.

However, we still have test specifying images directly without image config file, this will cause those test to panic. See:
* https://k8s-testgrid.appspot.com/google-docker#kubelet
* https://k8s-testgrid.appspot.com/google-docker#e2e-cos

This PR fixes this.

@vishh @mtaufen @kewu1992