K8s/Playlists: Only dual write when an external storage is configured (#82015)

pkg/registry/apis/playlist/register.go

@@ -113,7 +113,7 @@ func (b *PlaylistAPIBuilder) GetAPIGroupInfo(
 	storage[resource.StoragePath()] = legacyStore
 
 	// enable dual writes if a RESTOptionsGetter is provided
-	if optsGetter != nil {
+	if optsGetter != nil && dualWrite {
 		store, err := newStorage(scheme, optsGetter, legacyStore)
 		if err != nil {
 			return nil, err