Ensure that this works:

```python
@setup
def mytask():
    print("I am a setup task")

with dag_maker() as dag:
    mytask.override(task_id='newtask')

assert len(dag.task_group.children) == 1
setup_task = dag.task_group.children["newtask"]
assert setup_task._is_setup
```
and teardown also works
ensure_xcomarg_return_value(expand_input.value)
        task_kwargs = self.kwargs.copy()
        dag = task_kwargs.pop("dag", None) or DagContext.get_current_dag()
        task_group = task_kwargs.pop("task_group", None) or TaskGroupContext.get_current_task_group(dag)
        partial_kwargs, partial_params = get_merged_defaults(
            dag=dag,
            task_group=task_group,
            task_params=task_kwargs.pop("params", None),
            task_default_args=task_kwargs.pop("default_args", None),
        )
        partial_kwargs.update(task_kwargs)
        task_id = get_unique_task_id(partial_kwargs.pop("task_id"), dag, task_group)
        if task_group:
            task_id = task_group.child_id(task_id)
        
        if "task_concurrency" in partial_kwargs:
            raise TypeError("unexpected argument: task_concurrency")
        if partial_kwargs.get("wait_for_downstream"):
            partial_kwargs["depends_on_past"] = True
        start_date = timezone.convert_to_utc(partial_kwargs.pop("start_date", None))
        end_date = timezone.convert_to_utc(partial_kwargs.pop("end_date", None))
        if partial_kwargs.get("pool") is None:
            partial_kwargs["pool"] = Pool.DEFAULT_POOL_NAME
        partial_kwargs["retries"] = parse_retries(partial_kwargs.get("retries", DEFAULT_RETRIES))
        partial_kwargs["retry_delay"] = coerce_timedelta(