ENGCOM-1079: Removed cache backend option which explicitly set file permissions #14361

 - Merge Pull Request #14361 from xtremeperf/magento2:fix-cache-perms
 - Merged commits:
   1. 9baa83f

Author: magento-engcom-team

lib/internal/Magento/Framework/App/Cache/Frontend/Factory.php

@@ -71,7 +71,6 @@ class Factory
      */
     protected $_backendOptions = [
         'hashed_directory_level' => 1,
-        'hashed_directory_umask' => 0777,
         'file_name_prefix' => 'mage',
     ];