Automatic merge from submit-queue (batch tested with PRs 38783, 36396)

Display pod node selectors with kubectl describe.

**What this PR does / why we need it**:
This PR fixes kubectl describe so that it now shows associated node selectors with pods.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
```

@kubernetes/rh-cluster-infra @kubernetes/kubectl