Automatic merge from submit-queue (batch tested with PRs 54270, 54479). 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>.
fix kubectl set command
**What this PR does / why we need it**:
1. fix some errors in 'kubectl set' series command
2.remove unused function in kubectl set env command
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```
NONE
```