rebase: update all k8s packages to 0.27.2

Signed-off-by: Niels de Vos <ndevos@ibm.com>

vendor/k8s.io/apiserver/pkg/cel/openapi/extensions.go

@@ -0,0 +1,62 @@
+/*
+Copyright 2022 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 openapi
+
+import (
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/kube-openapi/pkg/validation/spec"
+)
+
+var intOrStringFormat = intstr.IntOrString{}.OpenAPISchemaFormat()
+
+func isExtension(schema *spec.Schema, key string) bool {
+	v, ok := schema.Extensions.GetBool(key)
+	return v && ok
+}
+
+func isXIntOrString(schema *spec.Schema) bool {
+	// built-in types have the Format while CRDs use extension
+	// both are valid, checking both
+	return schema.Format == intOrStringFormat || isExtension(schema, extIntOrString)
+}
+
+func isXEmbeddedResource(schema *spec.Schema) bool {
+	return isExtension(schema, extEmbeddedResource)
+}
+
+func isXPreserveUnknownFields(schema *spec.Schema) bool {
+	return isExtension(schema, extPreserveUnknownFields)
+}
+
+func getXListType(schema *spec.Schema) string {
+	s, _ := schema.Extensions.GetString(extListType)
+	return s
+}
+
+func getXListMapKeys(schema *spec.Schema) []string {
+	mapKeys, ok := schema.Extensions.GetStringSlice(extListMapKeys)
+	if !ok {
+		return nil
+	}
+	return mapKeys
+}
+
+const extIntOrString = "x-kubernetes-int-or-string"
+const extEmbeddedResource = "x-kubernetes-embedded-resource"
+const extPreserveUnknownFields = "x-kubernetes-preserve-unknown-fields"
+const extListType = "x-kubernetes-list-type"
+const extListMapKeys = "x-kubernetes-list-map-keys"