### 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.dagbag.get_dag('example_trigger_controller_dag')
        target_dag = self.dagbag.get_dag('example_trigger_target_dag')
        target_dag.sync_to_db()
        
        task_instances_list = []
        
        
        
        
        assert not task_instances_list
        job = BackfillJob(
            dag=dag, start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_first_depends_on_past=True
        )
        job.run()
        task_instances_list = []
        
        
        
        
        assert task_instances_list
    @pytest.mark.backend("postgres", "mysql")
    def test_backfill_multi_dates(self):