ACP2E-1973: Adobe Commerce Cloud cannot use GET_LOCK in the database because of Galera cluster limitation

- Add test coverage

Author: dyushkin

dev/tests/integration/testsuite/Magento/Framework/Cache/LockGuardedCacheLoaderTest.php

@@ -3,6 +3,7 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 namespace Magento\Framework\Cache;