Merge pull request #51321 from mengqiy/kubectl_apply_openapi

Automatic merge from submit-queue (batch tested with PRs 51321, 55969, 55039, 56183, 55976). 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>.

Kubectl apply and strategic merge patch using openapi

- [x] support openapi in strategic merge patch
- [x] test openapi in strategic merge patch
- [x] kubectl apply use openapi to calculate diff be default. It will fall back to use baked-in types when openapi is not available.
- [x] test openapi in kubectl apply

Fixes: kubernetes/kubectl#55

```release-note
kubectl apply use openapi to calculate diff be default. It will fall back to use baked-in types when openapi is not available.
```

/assign @apelisse

Kubernetes-commit: e412ad5393b8c949474b904616fc411c3aa478a9

vendor/k8s.io/api/apps/v1beta2/types.go

@@ -28,6 +28,7 @@ const (
 	StatefulSetRevisionLabel       = ControllerRevisionHashLabelKey
 	DeprecatedRollbackTo           = "deprecated.deployment.rollback.to"
 	DeprecatedTemplateGeneration   = "deprecated.daemonset.template.generation"
+	StatefulSetPodNameLabel        = "statefulset.kubernetes.io/pod-name"
 )
 
 // ScaleSpec describes the attributes of a scale subresource