rebase: update kubernetes to 1.28.0 in main

updating kubernetes to 1.28.0
in the main repo.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/apiextensions-apiserver/pkg/features/OWNERS

@@ -0,0 +1,4 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+  - feature-approvers

vendor/k8s.io/apiextensions-apiserver/pkg/features/kube_features.go

@@ -0,0 +1,48 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package features
+
+import (
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/component-base/featuregate"
+)
+
+const (
+	// Every feature gate should add method here following this template:
+	//
+	// // owner: @username
+	// // alpha: v1.4
+	// MyFeature() bool
+
+	// owner: @alexzielenski
+	// alpha: v1.28
+	//
+	// Ignores errors raised on unchanged fields of Custom Resources
+	// across UPDATE/PATCH requests.
+	CRDValidationRatcheting featuregate.Feature = "CRDValidationRatcheting"
+)
+
+func init() {
+	utilfeature.DefaultMutableFeatureGate.Add(defaultKubernetesFeatureGates)
+}
+
+// defaultKubernetesFeatureGates consists of all known Kubernetes-specific feature keys.
+// To add a new feature, define a key for it above and add it here. The features will be
+// available throughout Kubernetes binaries.
+var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
+	CRDValidationRatcheting: {Default: false, PreRelease: featuregate.Alpha},
+}