ISAICP-7742: Decrease temporary files deletion threshold & form cache expiration to 3 hours.

config/sync/system.file.yml

@@ -4,4 +4,4 @@ allow_insecure_uploads: false
 default_scheme: public
 path:
   temporary: /tmp
-temporary_maximum_age: 21600
+temporary_maximum_age: 10800

resources/runner/drupal.yml

@@ -190,6 +190,9 @@ drupal:
           $settings['trusted_host_patterns'] = [$trusted_host_patterns];
         }
 
+        // Expiration of cached forms is 3 hours.
+        $settings['form_cache_expiration'] = 10800;
+
         // Disable Piwik API calls until ISAICP-6944.
         // @see https://citnet.tech.ec.europa.eu/CITnet/jira/browse/ISAICP-6944
         $settings['joinup.parse_cached_computed_field'] = FALSE;