### Body

Add unit test for changes in https://github.com/apache/airflow/pull/17305

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
tests/jobs/test_backfill_job.py
dag = self._get_dummy_dag(dag_maker)
        dag_run = dag_maker.create_dagrun()
        job = BackfillJob(
            dag=dag,
            start_date=DEFAULT_DATE,
            end_date=DEFAULT_DATE + datetime.timedelta(days=8),
            ignore_first_depends_on_past=True,
        )
        job._set_unfinished_dag_runs_to_failed([dag_run])
        dag_run.refresh_from_db()
        assert State.FAILED == dag_run.state
    def test_dag_run_with_finished_tasks_set_to_success(self, dag_maker):
        dag = self._get_dummy_dag(dag_maker)
        dag_run = dag_maker.create_dagrun()
        for ti in dag_run.get_task_instances():
            ti.set_state(State.SUCCESS)
        job = BackfillJob(
            dag=dag,
            start_date=DEFAULT_DATE,
            end_date=DEFAULT_DATE + datetime.timedelta(days=8),
            ignore_first_depends_on_past=True,
        )
        job._set_unfinished_dag_runs_to_failed([dag_run])
        dag_run.refresh_from_db()
        assert State.SUCCESS == dag_run.state
    @pytest.mark.xfail(condition=True, reason="This test is flaky")
    @pytest.mark.backend("postgres", "mysql")
    def test_trigger_controller_dag(self):