Merge pull request #53363 from tcharding/genutils

Automatic merge from submit-queue (batch tested with PRs 52367, 53363, 54989, 54872, 54643). 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>.

cmd: genutils: remove entry from .golint_failures

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

`golint` emits warnings

```
exported function OutDir should have comment or be unexported
strings should not be capitalized or end with punctuation or a newline
```

- Add documentation comment to exported function OutDir.
- Remove newline from error string.
- Remove `hack\.golint_failures` entry for `cmd/genutils`

**Special notes for your reviewer**:
   
Don't know which sig to use?

**Release note**:

```release-note
NONE
```

/kind cleanup

hack/.golint_failures

@@ -1,5 +1,4 @@
 cluster/images/etcd-version-monitor
-cmd/genutils
 cmd/gke-certificates-controller/app
 cmd/hyperkube
 cmd/kube-controller-manager/app