**Description**

I have noticed that the stable REST API doesn't have the ability to run a task (which is possible from the airflow web interface.
I think it would be nice to have either:
- Run task 
- Run all failing tasks (rerun from point of failure)
this ability for integrations.

**Use case / motivation**

I would like the ability to identify the failing tasks on a specific DAG Run and rerun only them.
I would like to do it remotely (non-interactive) using the REST API.
I could write a script that run only the failing tasks, but I couldn't find a way to "Run" a task, when I have the task instance ID.

**Are you willing to submit a PR?**

Not at this stage

**Related Issues**



airflow/models/dag.py
self,
        state: str = State.RUNNING,
        session: Session = None,
        start_date: Optional[datetime] = None,
        end_date: Optional[datetime] = None,
        dag_ids: List[str] = None,
    ) -> None:
        dag_ids = dag_ids or [self.dag_id]
        query = session.query(DagRun).filter(DagRun.dag_id.in_(dag_ids))
        if start_date:
            query = query.filter(DagRun.execution_date >= start_date)
        if end_date:
            query = query.filter(DagRun.execution_date <= end_date)
        query.update({DagRun.state: state}, synchronize_session='fetch')
    @provide_session
    def clear(