Automatic merge from submit-queue
test/node-e2e: Update CoreOS update disabling
Previously in this saga... #25004
This disables update-engine and locksmithd with ignition instead of
cloud-init so that they're really totally 100% disabled. Our ignition guy promises.
Pretty much every way of disabling them with cloud-init is mildly racy.
Fixes#31633
I think @vishh can say "I told you so" after the comment on https://github.com/kubernetes/kubernetes/pull/30023#discussion-diff-73431324 .. he was right, but it turns out "stop" there doesn't really work either because of the mess that is cloud-init. Fortunately, converting our cloud-init to json and calling it "ignition" works quite well 😄
Testing done: I ssh'd in and verified that yes, they're disabled. I didn't wait on the e2e tests to pass, so we'll let this PR check that.
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