**Apache Airflow version**:

1.10.12

**What happened**:

I created dag with dagrun_timeout=2 minutes. 

After 2 minutes dagrun is marked as failed and the next one is started, but task keeps going.

**What you expected to happen**:

Task is killed with dag run as it is done when you mark dagrun failed manually.

**How to reproduce it**:
```
dag = DAG(dag_id='platform.airflow-test',
          description='',
          schedule_interval="0 0 * * *",
          start_date=datetime(2020, 7, 1),
          max_active_runs=1,
          catchup=True,
          dagrun_timeout=timedelta(minutes=2))

run_this = BashOperator(
    task_id='run_after_loop',
    bash_command=' for((i=1;i<=600;i+=1)); do echo "Welcome $i times"; sleep 1;  done',
    dag=dag,
)
```
tests/jobs/test_scheduler_job.py
dag1 = DAG(dag_id='test_change_state_for_tis_without_dagrun', start_date=DEFAULT_DATE)
        DummyOperator(task_id='dummy', dag=dag1, owner='airflow')
        DummyOperator(task_id='dummy_b', dag=dag1, owner='airflow')
        dag2 = DAG(dag_id='test_change_state_for_tis_without_dagrun_dont_change', start_date=DEFAULT_DATE)
        DummyOperator(task_id='dummy', dag=dag2, owner='airflow')
        dag3 = DAG(dag_id='test_change_state_for_tis_without_dagrun_no_dagrun', start_date=DEFAULT_DATE)
        DummyOperator(task_id='dummy', dag=dag3, owner='airflow')
        session = settings.Session()
        dr1 = dag1.create_dagrun(
            run_type=DagRunType.SCHEDULED,
            state=State.RUNNING,
            execution_date=DEFAULT_DATE,
            start_date=DEFAULT_DATE,
            session=session,
        )
        dr2 = dag2.create_dagrun(
            run_type=DagRunType.SCHEDULED,
            state=State.RUNNING,