Merge pull request #44808 from shiywang/SemanticDeepEqual

Automatic merge from submit-queue (batch tested with PRs 44931, 44808)

Update to use Semantic.DeepEqual in regsitry

**What this PR does / why we need it**:

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes https://github.com/kubernetes/kubernetes/issues/43402

**Release note**:
```
NONE
```

/assign @janetkuo

pkg/registry/apps/petset/BUILD

@@ -19,6 +19,7 @@ go_library(
         "//pkg/api:go_default_library",
         "//pkg/apis/apps:go_default_library",
         "//pkg/apis/apps/validation:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/equality:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/fields:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",

pkg/registry/apps/petset/strategy.go

@@ -18,8 +18,8 @@ package petset
 
 import (
 	"fmt"
-	"reflect"
 
+	apiequality "k8s.io/apimachinery/pkg/api/equality"
 	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -73,7 +73,7 @@ func (statefulSetStrategy) PrepareForUpdate(ctx genericapirequest.Context, obj,
 	// Any changes to the spec increment the generation number, any changes to the
 	// status should reflect the generation number of the corresponding object.
 	// See metav1.ObjectMeta description for more information on Generation.
-	if !reflect.DeepEqual(oldStatefulSet.Spec, newStatefulSet.Spec) {
+	if !apiequality.Semantic.DeepEqual(oldStatefulSet.Spec, newStatefulSet.Spec) {
 		newStatefulSet.Generation = oldStatefulSet.Generation + 1
 	}