**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
"""Returns a boolean indicating whether this DAG is paused"""
        qry = session.query(DagModel).filter(DagModel.dag_id == self.dag_id)
        return qry.value(DagModel.is_paused)
    @property
    def is_paused(self):
        """This attribute is deprecated. Please use `airflow.models.DAG.get_is_paused` method."""
        warnings.warn(
            "This attribute is deprecated. Please use `airflow.models.DAG.get_is_paused` method.",
            DeprecationWarning,
            stacklevel=2,
        )
        return self.get_is_paused()
    @property
    def normalized_schedule_interval(self) -> Optional[ScheduleInterval]:
        """
        Returns Normalized Schedule Interval. This is used internally by the Scheduler to
        schedule DAGs.
        1. Converts Cron Preset to a Cron Expression (e.g ``@monthly`` to ``0 0 1 * *``)
        2. If Schedule Interval is "@once" return "None"
        3. If not (1) or (2) returns schedule_interval
        """
        if isinstance(self.schedule_interval, str) and self.schedule_interval in cron_presets:
            _schedule_interval = cron_presets.get(self.schedule_interval)  
        elif self.schedule_interval == '@once':
            _schedule_interval = None
        else:
            _schedule_interval = self.schedule_interval
        return _schedule_interval
    @provide_session
    def handle_callback(self, dagrun, success=True, reason=None, session=None):