Automatic merge from submit-queue (batch tested with PRs 67026, 62945, 66917). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Cloud Provider Zones doc fixups

**What this PR does / why we need it**:

A few godoc fixups for Cloud Provider Zones.

```release-note
NONE
```