Automatic merge from submit-queue (batch tested with PRs 48402, 47203, 47460, 48335, 48322)

fix kubectl run --env flag

fixes: kubernetes/kubectl#19

cc: @ddcprg

```release-note
`kubectl run --env` no longer supports CSV parsing. To provide multiple env vars, use the `--env` flag multiple times instead of having env vars separated by commas. E.g. `--env ONE=1 --env TWO=2` instead of `--env ONE=1,TWO=2`.
```