feat: add csaupgrade option to upgrade subresource

Kubernetes-commit: 9633e25579dfa5449450875b9a238acc7cfac3e8

util/csaupgrade/options.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2024 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 csaupgrade
+
+type Option func(*options)
+
+// Subresource set the subresource to upgrade from CSA to SSA.
+func Subresource(s string) Option {
+	return func(opts *options) {
+		opts.subresource = s
+	}
+}
+
+type options struct {
+	subresource string
+}