Fix build codegen (#51130)

Summary:
When testing the release by running the `test-e2e-local` for RNTester on iOS, the script sometimes fails because it expect to have codegen properly built before running the app.
This fix makes sure we build the codegen package.

## Changelog:
[Internal] - Fix building the codegen

Pull Request resolved: https://github.com/facebook/react-native/pull/51130

Test Plan: Tested locally

Reviewed By: fabriziocucci

Differential Revision: D74248031

Pulled By: cipolleschi

fbshipit-source-id: 319f3332c616f7118b673fb7acb63c2e15946b2c

scripts/release-testing/test-e2e-local.js

@@ -224,17 +224,16 @@ async function testRNTester(
   ciArtifacts /*:Unwrap<ReturnType<typeof setupGHAArtifacts>> */,
   onReleaseBranch /*: boolean */,
 ) {
+  // Build Codegen as we're on a empty environment and metro needs it.
+  // This can be removed once we have codegen hooked in the `yarn build` step.
+  console.info('[Codegen] >>> Building react-native-codegen...');
+  exec('./packages/react-native-codegen/scripts/oss/build.sh');
+
   // FIXME: make sure that the commands retains colors
   // (--ansi) doesn't always work
   // see also https://github.com/shelljs/shelljs/issues/86
   pushd('packages/rn-tester');
 
-  // Build Codegen as we're on a empty environment and metro needs it.
-  // This can be removed once we have codegen hooked in the `yarn build` step.
-  exec(
-    '../../gradlew :packages:react-native:ReactAndroid:buildCodegenCLI --quiet',
-  );
-
   if (argv.platform === 'ios') {
     await testRNTesterIOS(ciArtifacts, onReleaseBranch);
   } else {