Automatic merge from submit-queue (batch tested with PRs 67739, 65222). 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>.

Tests: Make e2e test platform-agnostic

The test:
[k8s.io] Pods should support remote command execution over websockets [NodeConformance]

  uses cat on /etc/resolv.conf and checks if the output from the container is  "namespace",
which is incompatible with windows containers as there is no such file.

  Since the test just check if remote command execution works, the command is
irrelevant as long as the output checks out. Switched to using echo "remote execution test",
and checking that output as it works for both windows and linux.