fix missing project_id in rpc.delete_tag

@_rpc_groups(["Tags"])

def delete_tag(user: User, uid: str) -> bool:

def delete_tag(user: User, uid: str, project_id: int) -> bool:

    """

    Remove (delete) a tag based on its uid.

    Remove (delete) a tag based on its project and uid.

    Beware: This will remove ALL associations with the tag.

    """

    project = Project.objects.filter(pk=project_id).first()

    if not project:

        raise ServiceException(NO_SUCH_PROJECT)

    try:

        tag_instance = Tag.objects.get(uid=uid)

        UserAccess(user, tag_instance.project).check_delete(tag_instance)

        tag_instance = Tag.objects.get(project=project, uid=uid)

        UserAccess(user, project).check_delete(tag_instance)

        tag_instance.delete()

        return True

    except Tag.DoesNotExist:

        tags = methods.tags(self.test_user, self.test_project.pk)

        self.assertEqual(len(tags), 1)

    def test_delete_tag_is_scoped_to_project(self):

        other_project = models.Project.objects.create(label="other tag project")

        tag = models.Tag.objects.create(

            project=self.test_project, uid="shared tag", label="local"

        )

        other_tag = models.Tag.objects.create(

            project=other_project, uid="shared tag", label="foreign"

        )

        self.assertTrue(

            methods.delete_tag(self.test_user, tag.uid, self.test_project.pk)

        )

        self.assertFalse(models.Tag.objects.filter(pk=tag.pk).exists())

        self.assertTrue(models.Tag.objects.filter(pk=other_tag.pk).exists())

    def test_delete_tag_rejects_unknown_project(self):

        with self.assertRaises(ServiceException) as context:

            methods.delete_tag(self.test_user, "tag", -1)

        self.assertEqual(context.exception.message, methods.NO_SUCH_PROJECT)

    def test_add_collection_from_path(self):

        ancestors_labels = ["toto", "tata"]

        collections = methods.add_collection_from_path(