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/api/authentication/v1beta1/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 v1beta1
 
@@ -24,6 +24,26 @@ import (
 	runtime "k8s.io/apimachinery/pkg/runtime"
 )
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in ExtraValue) DeepCopyInto(out *ExtraValue) {
+	{
+		in := &in
+		*out = make(ExtraValue, len(*in))
+		copy(*out, *in)
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ExtraValue.
+func (in ExtraValue) DeepCopy() ExtraValue {
+	if in == nil {
+		return nil
+	}
+	out := new(ExtraValue)
+	in.DeepCopyInto(out)
+	return *out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *TokenReview) DeepCopyInto(out *TokenReview) {
 	*out = *in
@@ -48,9 +68,8 @@ func (in *TokenReview) DeepCopy() *TokenReview {
 func (in *TokenReview) DeepCopyObject() runtime.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.
@@ -98,8 +117,12 @@ func (in *UserInfo) DeepCopyInto(out *UserInfo) {
 		in, out := &in.Extra, &out.Extra
 		*out = make(map[string]ExtraValue, len(*in))
 		for key, val := range *in {
-			(*out)[key] = make(ExtraValue, len(val))
-			copy((*out)[key], val)
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				(*out)[key] = make([]string, len(val))
+				copy((*out)[key], val)
+			}
 		}
 	}
 	return