✅(back) fix backend code related to multipage dev

During the multipage dev, the code base has changed a lot and rebase
after rebase it has come difficult to manage fixup commits. This commits
fix modification made that can be fixup in previous commits. The
persmission AccessPermission has been renamed in
ResourceWithAccessPermission and should be used in the
DocumentAskForAccessViewSet. A migration with the same dependency
exists, the last one is fixed. And a test didn't have removed an
abilitites.

src/backend/core/api/viewsets.py

@@ -926,8 +926,7 @@ class DocumentViewSet(
         )
         serializer.is_valid(raise_exception=True)
         with_accesses = serializer.validated_data.get("with_accesses", False)
-        roles = set(document.get_roles(request.user))
-        is_owner_or_admin = bool(roles.intersection(set(models.PRIVILEGED_ROLES)))
+        is_owner_or_admin = document.get_role(request.user) in models.PRIVILEGED_ROLES
 
         base64_yjs_content = document.content
 
@@ -1898,7 +1897,10 @@ class DocumentAskForAccessViewSet(
 
     lookup_field = "id"
     pagination_class = Pagination
-    permission_classes = [permissions.IsAuthenticated, permissions.AccessPermission]
+    permission_classes = [
+        permissions.IsAuthenticated,
+        permissions.ResourceWithAccessPermission,
+    ]
     queryset = models.DocumentAskForAccess.objects.all()
     serializer_class = serializers.DocumentAskForAccessSerializer
     _document = None
@@ -1921,8 +1923,9 @@ class DocumentAskForAccessViewSet(
         queryset = super().get_queryset()
         queryset = queryset.filter(document=document)
 
-        roles = set(document.get_roles(self.request.user))
-        is_owner_or_admin = bool(roles.intersection(set(models.PRIVILEGED_ROLES)))
+        is_owner_or_admin = (
+            document.get_role(self.request.user) in models.PRIVILEGED_ROLES
+        )
         if not is_owner_or_admin:
             queryset = queryset.filter(user=self.request.user)