Automatic merge from submit-queue (batch tested with PRs 48981, 47316, 49180)
Added golint check for pkg/kubelet.
**What this PR does / why we need it**:
Added golint check for pkg/kubelet, and make golint happy.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#47315
**Release note**:
```release-note-none
```