Automatic merge from submit-queue

fix recursive & non-recursive kubectl get of generic output format

This PR fixes the issues with `kubectl get` in https://github.com/kubernetes/kubernetes/issues/26466

Changes made:
- fix printing when using the generic output format in both non-recursive & recurvise settings to ensure that errors are being shown
- add tests to check printing generic output in a **non-recursive** setting with non-existent pods
- clean up the **recursive** `kubectl get` tests

/cc @janetkuo