### 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.
airflow/jobs/backfill_job.py
filter_for_tis = TI.filter_for_tis(tis_to_be_scheduled)
            session.query(TI).filter(filter_for_tis).update(
                values={TI.state: State.SCHEDULED}, synchronize_session=False
            )
    def _manage_executor_state(self, running):
        """
        Checks if the executor agrees with the state of task instances
        that are running
        :param running: dict of key, task to verify
        """
        executor = self.executor
        
        for key, value in list(executor.get_event_buffer().items()):
            state, info = value
            if key not in running:
                self.log.warning("%s state %s not in running=%s", key, state, running.values())
                continue
            ti = running[key]
            ti.refresh_from_db()
            self.log.debug("Executor state: %s task %s", state, ti)
            if state in (State.FAILED, State.SUCCESS) and ti.state in self.STATES_COUNT_AS_RUNNING:
                msg = (
                    "Executor reports task instance {} finished ({}) "
                    "although the task says its {}. Was the task "
                    "killed externally? Info: {}".format(ti, state, ti.state, info)
                )
                self.log.error(msg)
                ti.handle_failure_with_callback(error=msg)
    @provide_session
    def _get_dag_run(self, dagrun_info: DagRunInfo, dag: DAG, session: Session = None):