TF-3493 Refactor integration test code for performance and maintainability

Signed-off-by: dab246 <tdvu@linagora.com>

integration_test/tests/app_grid/app_grid_test.dart

@@ -1,24 +1,9 @@
 import '../../base/test_base.dart';
 import '../../scenarios/app_grid_scenario.dart';
-import '../../scenarios/login_with_basic_auth_scenario.dart';
 
 void main() {
   TestBase().runPatrolTest(
     description: 'Should display and navigate app grid correctly when clicked',
-    test: ($) async {
-      final loginWithBasicAuthScenario = LoginWithBasicAuthScenario($,
-        username: const String.fromEnvironment('USERNAME'),
-        hostUrl: const String.fromEnvironment('BASIC_AUTH_URL'),
-        email: const String.fromEnvironment('BASIC_AUTH_EMAIL'),
-        password: const String.fromEnvironment('PASSWORD'),
-      );
-
-      final appGridScenario = AppGridScenario(
-        $,
-        loginWithBasicAuthScenario: loginWithBasicAuthScenario,
-      );
-
-      await appGridScenario.execute();
-    }
+    scenarioBuilder: ($) => AppGridScenario($),
   );
 }