TM iOS: Disable in test environment

Summary:
For now, disable TM completely in test environment, like RNTester integration/unit tests. See details in T53341772

This also fixes the failure discussed in #26151

Reviewed By: PeteTheHeat

Differential Revision: D17147915

fbshipit-source-id: 1c48ebb9c3b81fc08bc33606dcc38c29297d6010

React/Base/RCTBridge.m

@@ -93,6 +93,12 @@ void RCTRegisterModule(Class moduleClass)
 static BOOL turboModuleEnabled = NO;
 BOOL RCTTurboModuleEnabled(void)
 {
+#if RCT_DEBUG
+  // TODO(T53341772): Allow TurboModule for test environment. Right now this breaks RNTester tests if enabled.
+  if (RCTRunningInTestEnvironment()) {
+    return NO;
+  }
+#endif
   return turboModuleEnabled;
 }