K8s: Make v0alpha1 opt-in (#107056)

pkg/registry/apis/folders/register.go

@@ -130,6 +130,10 @@ func (b *FolderAPIBuilder) InstallSchema(scheme *runtime.Scheme) error {
 	return scheme.SetVersionPriority(b.gv)
 }
 
+func (b *FolderAPIBuilder) AllowedV0Alpha1Resources() []string {
+	return nil
+}
+
 func (b *FolderAPIBuilder) UpdateAPIGroupInfo(apiGroupInfo *genericapiserver.APIGroupInfo, opts builder.APIGroupOptions) error {
 	scheme := opts.Scheme
 	optsGetter := opts.OptsGetter