Automatic merge from submit-queue (batch tested with PRs 54987, 55221, 54099, 55144, 54215). 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>.

Scale help

**What this PR does / why we need it**:
The `kubectl autoscale --help` says this:

```
# Auto scale a deployment "foo", with the number of pods between 2 and 10, target CPU utilization specified so a default autoscaling policy will be used:
  kubectl autoscale deployment foo --min=2 --max=10
```

This is incorrect. A default autoscaling policy will be used because *no* target CPU utilization has been specified.

**Which issue(s) this PR fixes**:

**Special notes for your reviewer**:

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