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
from airflow.kubernetes.pod_generator import PodGenerator
from airflow.models import DAG, Connection, DagBag, Operator
from airflow.models.baseoperator import BaseOperator, BaseOperatorLink
from airflow.models.expandinput import EXPAND_INPUT_EMPTY
from airflow.models.mappedoperator import MappedOperator
from airflow.models.param import Param, ParamsDict
from airflow.models.xcom import XCom
from airflow.operators.bash import BashOperator
from airflow.operators.empty import EmptyOperator
from airflow.security import permissions
from airflow.sensors.bash import BashSensor
from airflow.serialization.json_schema import load_dag_schema_dict
from airflow.serialization.serialized_objects import (
    DagDependency,
    DependencyDetector,
    SerializedBaseOperator,
    SerializedDAG,
)
from airflow.ti_deps.deps.base_ti_dep import BaseTIDep
from airflow.timetables.simple import NullTimetable, OnceTimetable
from airflow.utils import timezone
from airflow.utils.context import Context
from airflow.utils.operator_resources import Resources
from airflow.utils.task_group import TaskGroup
from airflow.utils.xcom import XCOM_RETURN_KEY
from tests.test_utils.config import conf_vars
from tests.test_utils.mock_operators import CustomOperator, GoogleLink, MockOperator
from tests.test_utils.timetables import CustomSerializationTimetable, cron_timetable, delta_timetable
repo_root = Path(airflow.__file__).parent.parent
class CustomDepOperator(BashOperator):