Merge pull request #60139 from soltysh/deprecate_scale_job

Automatic merge from submit-queue. 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>.

Deprecate kubectl scale job

**What this PR does / why we need it**:
With the generic scaler (https://github.com/kubernetes/kubernetes/pull/58298) the only problem is job and as discussed in https://github.com/kubernetes/kubernetes/pull/58468#issuecomment-360794229 and during SIG CLI we've agreed that scaling jobs was a mistake we need to revert. 
This PR deprecates scale command for jobs, only. 

/assign @deads2k @pwittrock 

**Release note**:
```release-note
Deprecate kubectl scale jobs (only jobs). 
```

pkg/kubectl/cmd/exec_test.go

@@ -142,6 +142,7 @@ func TestPodAndContainer(t *testing.T) {
 
 		cmd := &cobra.Command{}
 		options := test.p
+		options.Err = bytes.NewBuffer([]byte{})
 		err := options.Complete(f, cmd, test.args, test.argsLenAtDash)
 		if test.expectError && err == nil {
 			t.Errorf("%s: unexpected non-error", test.name)