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
elif start_date:
            self.start_date = timezone.convert_to_utc(start_date)
        if end_date:
            self.end_date = timezone.convert_to_utc(end_date)
        self.executor_config = executor_config or {}
        self.run_as_user = run_as_user
        self.retries = parse_retries(retries)
        self.queue = queue
        self.pool = Pool.DEFAULT_POOL_NAME if pool is None else pool
        self.pool_slots = pool_slots
        if self.pool_slots < 1:
            dag_str = f" in dag {dag.dag_id}" if dag else ""
            raise ValueError(f"pool slots for {self.task_id}{dag_str} cannot be less than 1")
        self.sla = sla
        if trigger_rule == "dummy":
            warnings.warn(
                "dummy Trigger Rule is deprecated. Please use `TriggerRule.ALWAYS`.",
                RemovedInAirflow3Warning,
                stacklevel=2,
            )
            trigger_rule = TriggerRule.ALWAYS
        if trigger_rule == "none_failed_or_skipped":
            warnings.warn(
                "none_failed_or_skipped Trigger Rule is deprecated. "
                "Please use `none_failed_min_one_success`.",
                RemovedInAirflow3Warning,
                stacklevel=2,
            )
            trigger_rule = TriggerRule.NONE_FAILED_MIN_ONE_SUCCESS
        if not TriggerRule.is_valid(trigger_rule):