Fix RNTester TurboModules loading (facebook#29538)

Summary:
It is now required to call RCTBridge.setRCTTurboModuleRegistry for turbo modules to work properly on iOS.

## Changelog

[Internal] [Fix] - Fix RNTester TurboModules loading

Pull Request resolved: facebook#29538

Test Plan: Tested that images in RNTester now loads properly and Redbox module missing warning are gone.

Reviewed By: JoshuaGross

Differential Revision: D22884163

Pulled By: fkgozali

fbshipit-source-id: daf2fccdb518ec4a382b80b7f7b02004405a7564

Author: janicduplessis

RNTester/RNTester/AppDelegate.mm

@@ -153,6 +153,7 @@ - (void)loadSourceForBridge:(RCTBridge *)bridge
   _turboModuleManager = [[RCTTurboModuleManager alloc] initWithBridge:bridge
                                                              delegate:self
                                                             jsInvoker:bridge.jsCallInvoker];
+  [bridge setRCTTurboModuleRegistry:_turboModuleManager];
 
 #if RCT_DEV
   /**