Merge pull request #46727 from janetkuo/kubectl-valid-resources

Automatic merge from submit-queue (batch tested with PRs 46112, 46764, 46727, 46974, 46968)

Add controllerrevisions as valid resource in kubectl help

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

**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**: controllerrevisions is a new resource added in 1.7 @kubernetes/sig-cli-maintainers 

**Release note**:

```release-note
```

pkg/kubectl/cmd/cmd.go

@@ -208,6 +208,7 @@ __custom_func() {
     * clusters (valid only for federation apiservers)
     * componentstatuses (aka 'cs')
     * configmaps (aka 'cm')
+    * controllerrevisions
     * cronjobs
     * daemonsets (aka 'ds')
     * deployments (aka 'deploy')