Merge pull request #4016 from CHItA/ticket/14270

[ticket/14270] Purge cache when the installer is finished

* CHItA/ticket/14270:
  [ticket/14270] Purge cache when the installer is finished

phpBB/config/installer/container/services.yml

@@ -9,6 +9,11 @@ imports:
     - { resource: ../../default/container/services_twig.yml }
 
 services:
+    cache.driver:
+        class: %cache.driver.class%
+        arguments:
+            - "%core.root_path%/cache/installer/"
+
     config:
         class: phpbb\config\config
         arguments:

phpBB/config/installer/container/services_installer.yml

@@ -86,6 +86,7 @@ services:
         class: phpbb\install\installer
         abstract: true
         arguments:
+            - @cache.driver
             - @installer.helper.config
             - @path_helper