Merge pull request #64697 from sttts/sttts-fuzzer-no-empty-label-keys

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>.

apimachinery: do not fuzz ObjectMeta.{Labels/Annotation} with empty keys

Fixes flaking `TestReplicationControllerConversion`.

staging/src/k8s.io/apimachinery/pkg/apis/meta/fuzzer/fuzzer.go

@@ -200,9 +200,13 @@ func v1FuzzerFuncs(codecs runtimeserializer.CodecFactory) []interface{} {
 
 			if len(j.Labels) == 0 {
 				j.Labels = nil
+			} else {
+				delete(j.Labels, "")
 			}
 			if len(j.Annotations) == 0 {
 				j.Annotations = nil
+			} else {
+				delete(j.Annotations, "")
 			}
 			if len(j.OwnerReferences) == 0 {
 				j.OwnerReferences = nil