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
"downstream_group_ids": [],
            "upstream_task_ids": [],
            "downstream_task_ids": [],
        },
        "is_paused_upon_creation": False,
        "_dag_id": "simple_dag",
        "doc_md": "### DAG Tutorial Documentation",
        "fileloc": None,
        "_processor_dags_folder": f"{repo_root}/tests/dags",
        "tasks": [
            {
                "task_id": "bash_task",
                "owner": "airflow",
                "retries": 1,
                "retry_delay": 300.0,
                "max_retry_delay": 600.0,
                "sla": 100.0,
                "downstream_task_ids": [],
                "_is_empty": False,
                "ui_color": "#f0ede4",
                "ui_fgcolor": "#000",
                "template_ext": [".sh", ".bash"],
                "template_fields": ["bash_command", "env"],
                "template_fields_renderers": {"bash_command": "bash", "env": "json"},
                "bash_command": "echo {{ task.task_id }}",
                "_task_type": "BashOperator",
                "_task_module": "airflow.operators.bash",
                "pool": "default_pool",
                "_is_setup": False,
                "_is_teardown": False,