Adds dart_fix support to integration_test (#129579)

* Adds fix for `IntegrationTestWidgetsFlutterBinding.runTest(timeout)` to support first round of deprecations for `flutter_test`

Resolves #124346

dev/bots/test.dart

@@ -971,6 +971,7 @@ Future<void> _runFrameworkTests() async {
     await runTracingTests();
     await runFixTests('flutter');
     await runFixTests('flutter_test');
+    await runFixTests('integration_test');
     await runPrivateTests();
   }