Automatic merge from submit-queue (batch tested with PRs 50213, 50707, 49502, 51230, 50848)

StatefulSet: Deflake e2e `kubectl exec` commands.

This may help with another source of flakiness found while investigating #48031.

We seem to get a lot of flakes due to "connection refused" while running `kubectl exec`. I can't find any reason this would be caused by the test flow, so I'm adding retries to see if that helps.