Added rollback for newsletter/general/active

Author: sedonik

dev/tests/integration/testsuite/Magento/Customer/_files/customer_subscribe_rollback.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+use Magento\Framework\App\Config\Storage\WriterInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+
+$objectManager = Bootstrap::getObjectManager();
+
+/** @var Writer  $configWriter */
+$configWriter = $objectManager->create(WriterInterface::class);
+$configWriter->delete('newsletter/general/active');