chore: move new mfa tests to be closer to the old ones

Author: khatruong2009

packages/auth/amplify_auth_cognito/example/integration_test/main_test.dart

@@ -55,18 +55,18 @@ void main() async {
     get_current_user_tests.main();
     hosted_ui_webview_tests.main();
     hub_events_tests.main();
-    mfa_email_optional_tests.main();
-    mfa_email_required_tests.main();
-    mfa_sms_email_optional_tests.main();
-    mfa_sms_email_required_tests.main();
-    mfa_email_totp_optional_tests.main();
-    mfa_email_totp_required_tests.main();
     mfa_username_login_required_tests.main();
     mfa_sms_tests.main();
     mfa_sms_totp_optional_tests.main();
     mfa_sms_totp_required_tests.main();
     mfa_totp_optional_tests.main();
     mfa_totp_required_tests.main();
+    mfa_email_optional_tests.main();
+    mfa_email_required_tests.main();
+    mfa_sms_email_optional_tests.main();
+    mfa_sms_email_required_tests.main();
+    mfa_email_totp_optional_tests.main();
+    mfa_email_totp_required_tests.main();
     native_auth_bridge_tests.main();
     reset_password_tests.main();
     security_tests.main();