Automatic merge from submit-queue (batch tested with PRs 48425, 41680, 48457, 48619, 48635)
Improved code coverage for pkg/kubelet/types/pod_update
The test coverage for pod_update.go was imprved from 36% to 100%.
**What this PR does / why we need it**:
This fixed part of #40780
**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**:
```release-note
```
2a23d8bb43