### 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
elif ti.state == State.NONE:
                    self.log.warning(
                        "FIXME: Task instance %s state was set to None externally. This should not happen", ti
                    )
                    ti.set_state(State.SCHEDULED, session=session)
                if self.rerun_failed_tasks:
                    
                    if ti.state in (State.FAILED, State.UPSTREAM_FAILED):
                        self.log.error("Task instance %s with state %s", ti, ti.state)
                        if key in ti_status.running:
                            ti_status.running.pop(key)
                        
                        ti.set_state(State.SCHEDULED, session=session)
                else:
                    
                    if ti.state in (State.FAILED, State.UPSTREAM_FAILED):
                        self.log.error("Task instance %s with state %s", ti, ti.state)
                        ti_status.failed.add(key)
                        ti_status.to_run.pop(key)
                        if key in ti_status.running:
                            ti_status.running.pop(key)
                        return
                if self.ignore_first_depends_on_past:
                    dagrun = ti.get_dagrun(session=session)
                    ignore_depends_on_past = dagrun.execution_date == (start_date or ti.start_date)
                else:
                    ignore_depends_on_past = False
                backfill_context = DepContext(