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
if retries is None or isinstance(retries, int):
        return retries
    try:
        parsed_retries = int(retries)
    except (TypeError, ValueError):
        raise AirflowException(f"'retries' type must be int, not {type(retries).__name__}")
    logger.warning("Implicitly converting 'retries' from %r to int", retries)
    return parsed_retries
def coerce_timedelta(value: float | timedelta, *, key: str) -> timedelta:
    if isinstance(value, timedelta):
        return value
    logger.debug("%s isn't a timedelta object, assuming secs", key)
    return timedelta(seconds=value)
def coerce_resources(resources: dict[str, Any] | None) -> Resources | None:
    if resources is None:
        return None
    return Resources(**resources)
def _get_parent_defaults(dag: DAG | None, task_group: TaskGroup | None) -> tuple[dict, ParamsDict]: