Merge pull request #59674 from jennybuckley/codegen

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>.

code-gen: output golint compliant 'Generated by' comment

New PR instead of reopening #58115 because /reopen did not work.
This won't be ready to merge until the upstream https://github.com/kubernetes/gengo/pull/94 merges. Once that merges, the second commit will be changed to godep-save.sh and update-staging-godeps.sh, and the last commit will be changed to update-all.sh

The failing test is due to the upstream changes not being merged yet

```devel-release-note
Go code generated by the code generators will now have a comment which allows them to be easily identified by golint
```

Fixes #56489

Kubernetes-commit: 1eb1c00c44f8f597b9b23a05cd0a8da205c87f8a

vendor/k8s.io/apimachinery/pkg/runtime/zz_generated.deepcopy.go

@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package runtime
 
@@ -72,9 +72,8 @@ func (in *Unknown) DeepCopy() *Unknown {
 func (in *Unknown) DeepCopyObject() Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -108,7 +107,6 @@ func (in *VersionedObjects) DeepCopy() *VersionedObjects {
 func (in *VersionedObjects) DeepCopyObject() Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }