Use noop@internal instead of our own dummy service

There seems to be no documentation about this,
but I saw some references in it to the logs, as well as some
public mentions:

- traefik/traefik#7242
- traefik/traefik#7291

templates/provider.yml.j2

@@ -1,16 +1,11 @@
 #jinja2: lstrip_blocks: "True"
 
 http:
-  services:
-    dummy:
-      loadBalancer:
-        servers:
-          - url: http://127.0.0.1
   routers:
     {% for domain in devture_traefik_additional_domains_to_obtain_certificates_for %}
       {{ domain }}-dummy:
         rule: Host(`{{ domain }}`)
-        service: dummy
+        service: noop@internal
         tls:
           certResolver: {{ devture_traefik_additional_domains_to_obtain_certificates_for_certResolver | to_json }}
 	{% endfor %}