Automatic merge from submit-queue (batch tested with PRs 41064, 41090, 41068, 41073, 40882)

kubeadm: updated tests in app/util pkg

**What this PR does / why we need it**: Tests did not follow the standard of being table driven. Updated to make future changes (Adding/deleting tests) easier as well as more readable

Adding unit tests is a WIP from #34136

**Special notes for your reviewer**: /cc @luxas @pires 

**Release note**:
```release-note
NONE
```