Fix reported properties for native modules

Summary:
Changelog: [internal]

This fixes the reported keys for C++ TurboModules. Before, we were trying to read the properties from the method map in the public `TurboModule`, but in this implementation all the logic is actually in its delegate (also a `TurboModule` instance, yeah, confusing).

This fixes the issue by forwarding the call to the delegate that has the right information.

Differential Revision: D63761381

Author: rubennorte

packages/react-native-codegen/src/generators/modules/GenerateModuleH.js

@@ -80,6 +80,10 @@ public:
     return delegate_.create(rt, propName);
   }
 
+  std::vector<jsi::PropNameID> getPropertyNames(jsi::Runtime& runtime) override {
+    return delegate_.getPropertyNames(runtime);
+  }
+
   static constexpr std::string_view kModuleName = "${moduleName}";
 
 protected: