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
self, other: DependencyMixin, upstream: bool = True, edge_modifier: EdgeModifier | None = None
    ) -> None:
        """
        Overrides TaskMixin.update_relative.
        Update upstream_group_ids/downstream_group_ids/upstream_task_ids/downstream_task_ids
        accordingly so that we can reduce the number of edges when displaying Graph view.
        """
        if isinstance(other, TaskGroup):
            
            if upstream:
                parent, child = (self, other)
                if edge_modifier:
                    edge_modifier.add_edge_info(self.dag, other.downstream_join_id, self.upstream_join_id)
            else:
                parent, child = (other, self)
                if edge_modifier:
                    edge_modifier.add_edge_info(self.dag, self.downstream_join_id, other.upstream_join_id)
            parent.upstream_group_ids.add(child.group_id)
            child.downstream_group_ids.add(parent.group_id)
        else:
            
            for task in other.roots:
                if not isinstance(task, DAGNode):
                    raise AirflowException(
                        "Relationships can only be set between TaskGroup "
                        f"or operators; received {task.__class__.__name__}"
                    )
                
                if self == task: