feat: idempotence for CGI-Extension-Config activation task

tasks/configure_apache.yml

@@ -32,6 +32,7 @@
 # symlink /etc/apache2/conf-available/serve-cgi-bin.conf to /etc/apache2/conf-enabled/
 - name: CGI-Extension-Config aktivieren
   command: "/usr/sbin/a2enconf serve-cgi-bin"        # noqa 301
+  changed_when: "not db_create_result.stdout|search('already enabled')"
   notify:
     - restart apache