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
```