Use deleteRecursive instead of rmdir

Problem/Motivation

Warning: rmdir(/tmp/mycache/config/): Directory not empty in Drupal\Core\File\FileSystem->rmdir() (line 252 of /d9.5.9/html/core/lib/Drupal/Core/File/FileSystem.php)

Steps to reproduce

Proposed resolution

Use deleteRecursive which will empty the file
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21File%21Fi...

Remaining tasks

User interface changes

API changes

Data model changes