Log error when TMMDelegate getModuleForClass returns nil

Summary:
Ideally, the application should always be able to create the TurboModule object given an ObjC class. This debugging information will help track down these classes of issues, when they surface.

Changelog: [Internal]

Reviewed By: fkgozali

Differential Revision: D35945399

fbshipit-source-id: 1621a4a64bc8fb0411123fb1470bbb52ccf0edcf

ReactCommon/react/nativemodule/core/platform/ios/RCTTurboModuleManager.mm

@@ -527,7 +527,7 @@ static Class getFallbackClassFromName(const char *name)
      * abort TurboModule creation, and early return nil.
      */
     if (!module) {
-      RCTLogWarn(
+      RCTLogError(
           @"TurboModuleManager delegate %@ returned nil TurboModule object for module with name=\"%s\" and class=%@",
           NSStringFromClass([_delegate class]),
           moduleName,