Log that bridgeless is enabled (if so) to the console (facebook#42113)

Summary:
Pull Request resolved: facebook#42113

For easier testing/debugging, log something if bridgeless is enabled for the app. This log will show up only once.

Changelog: [Internal]

Reviewed By: cortinico

Differential Revision: D52464640

fbshipit-source-id: 5019a1a6bf4f171a5f1dc4b3b2692db9e07ff43c

packages/react-native/Libraries/ReactNative/AppRegistry.js

@@ -361,7 +361,9 @@ global.RN$SurfaceRegistry = {
   setSurfaceProps: AppRegistry.setSurfaceProps,
 };
 
-if (global.RN$Bridgeless !== true) {
+if (global.RN$Bridgeless === true) {
+  console.log('Bridgeless mode is enabled');
+} else {
   BatchedBridge.registerCallableModule('AppRegistry', AppRegistry);
 }