vendor: bump k8s to v0.25.4

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/emicklei/go-restful/v3/extensions.go

@@ -0,0 +1,21 @@
+package restful
+
+// Copyright 2021 Ernest Micklei. All rights reserved.
+// Use of this source code is governed by a license
+// that can be found in the LICENSE file.
+
+// ExtensionProperties provides storage of vendor extensions for entities
+type ExtensionProperties struct {
+	// Extensions vendor extensions used to describe extra functionality
+	// (https://swagger.io/docs/specification/2-0/swagger-extensions/)
+	Extensions map[string]interface{}
+}
+
+// AddExtension adds or updates a key=value pair to the extension map.
+func (ep *ExtensionProperties) AddExtension(key string, value interface{}) {
+	if ep.Extensions == nil {
+		ep.Extensions = map[string]interface{}{key: value}
+	} else {
+		ep.Extensions[key] = value
+	}
+}