Automatic merge from submit-queue (batch tested with PRs 50257, 50247, 50665, 50554, 51077)

Refactor kubectl factory test case with sets.String

**What this PR does / why we need it**:
change to make got and want use sets.String instead, since that is both safe and more clearly shows the intent.

**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
NONE
```