feat: refactor teamer-document upload for admins

templates/administrative/assignment/detail.html.twig

@@ -179,7 +179,7 @@
                             </td>
                             <td>
                                 <div class="flex items-center justify-end space-x-2">
-                                    {% if workflow_can(disposition, 'upload_contract') or workflow_can(disposition, 'upload_invoice') %}
+                                    {% if is_granted('CONTRACT_SUPPLEMENTARY', disposition) %}
                                         <button type="button"
                                                 title="Dokumentenupload"
                                                 hx-get="{{ path('app_administrative_disposition_document_upload', { 'uuid': disposition.uuid }) }}"