Fix the Redefinition of 'NativeXXXSpecJSI' error with Frameworks (#44005)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44005

When using frameworks on iOS, there is a possibility that modules import the Spec.h file twice and this might end up in a Redefinition of some symbols and duplication of symbols which ends up in build errors, as reported here: https://github.com/facebook/react-native/issues/42670.

This change adds some [`#include guards`](https://en.wikipedia.org/wiki/Include_guard) in codegen to avoid the redefinition of those symbols if the header is imported/included multiple times.

Note: I also experimented with `#pragma once`, but it looks like Apple is not happy with that directive. [It seems](https://forums.developer.apple.com/forums/thread/739964) that it started working flakely from Xcode 15.

## Changelog:
[General][Fixed] - Make sure that we can't include Codegen symbols multiple times

Reviewed By: cortinico

Differential Revision: D55925605

fbshipit-source-id: 15ca076aace2ffbd03ab8fa8a68a3d8ce0d1ea65

packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/index.js

@@ -46,15 +46,20 @@ namespace facebook::react {
 } // namespace facebook::react`;
 
 const HeaderFileTemplate = ({
+  headerFileName,
   moduleDeclarations,
   structInlineMethods,
   assumeNonnull,
 }: $ReadOnly<{
+  headerFileName: string,
   moduleDeclarations: string,
   structInlineMethods: string,
   assumeNonnull: boolean,
-}>) =>
-  `/**
+}>) => {
+  const headerFileNameWithNoExt = headerFileName.replace(/\.h$/, '');
+
+  return (
+    `/**
  * This code was generated by [react-native-codegen](https://www.npmjs.com/package/react-native-codegen).
  *
  * Do not edit this file as changes may cause incorrect behavior and will be lost
@@ -70,6 +75,11 @@ const HeaderFileTemplate = ({
 #ifndef __cplusplus
 #error This file must be compiled as Obj-C++. If you are importing it, you must change your file extension to .mm.
 #endif
+
+// Avoid multiple includes of ${headerFileNameWithNoExt} symbols
+#ifndef ${headerFileNameWithNoExt}_H
+#define ${headerFileNameWithNoExt}_H
+
 #import <Foundation/Foundation.h>
 #import <RCTRequired/RCTRequired.h>
 #import <RCTTypeSafety/RCTConvertHelpers.h>
@@ -82,11 +92,15 @@ const HeaderFileTemplate = ({
 #import <vector>
 
 ` +
-  (assumeNonnull ? '\nNS_ASSUME_NONNULL_BEGIN\n' : '') +
-  moduleDeclarations +
-  '\n' +
-  structInlineMethods +
-  (assumeNonnull ? '\nNS_ASSUME_NONNULL_END\n' : '\n');
+    (assumeNonnull ? '\nNS_ASSUME_NONNULL_BEGIN\n' : '') +
+    moduleDeclarations +
+    '\n' +
+    structInlineMethods +
+    (assumeNonnull ? '\nNS_ASSUME_NONNULL_END\n' : '\n') +
+    `#endif // ${headerFileNameWithNoExt}_H` +
+    '\n'
+  );
+};
 
 const SourceFileTemplate = ({
   headerFileName,
@@ -197,6 +211,7 @@ module.exports = {
 
     const headerFileName = `${libraryName}.h`;
     const headerFile = HeaderFileTemplate({
+      headerFileName,
       moduleDeclarations: moduleDeclarations.join('\n'),
       structInlineMethods: structInlineMethods.join('\n'),
       assumeNonnull,