### Description

expanding tasks in batches to allow mapped tasks spawn more than 1024 processes.

### Use case/motivation

Maximum length of a list is limited to 1024 by `max_map_length (AIRFLOW__CORE__MAX_MAP_LENGTH)`.
during scheduling of the new tasks, an UPDATE query is ran that tries to set all the new tasks at once.  Increasing `max_map_length` more than 4K makes airflow scheduler completely unresponsive.

Also, Postgres throws `stack depth limit exceeded` error which can be fixed by updating to a newer version and setting `max_stack_depth` higher. But it doesn't really matter because airflow scheduler freezes up.
 
As a workaround, I split the dag runs into subdag runs which works but it would be much nicer if we didn't have to worry about exceeding  `max_map_length`. 

### Related issues

It was discussed here:
[Increasing 'max_map_length' leads to SQL 'max_stack_depth' error with 5000 dags to be spawned #28478](https://github.com/apache/airflow/discussions/28478)

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

cls,
        dag_id: str | list[str] | None = None,
        run_id: Iterable[str] | None = None,
        execution_date: datetime | Iterable[datetime] | None = None,
        state: DagRunState | None = None,
        external_trigger: bool | None = None,
        no_backfills: bool = False,
        run_type: DagRunType | None = None,
        session: Session = NEW_SESSION,
        execution_start_date: datetime | None = None,
        execution_end_date: datetime | None = None,
    ) -> list[DagRun]:
        """
        Returns a set of dag runs for the given search criteria.
        :param dag_id: the dag_id or list of dag_id to find dag runs for
        :param run_id: defines the run id for this dag run
        :param run_type: type of DagRun
        :param execution_date: the execution date
        :param state: the state of the dag run
        :param external_trigger: whether this dag run is externally triggered
        :param no_backfills: return no backfills (True), return all (False).
            Defaults to False
        :param session: database session
        :param execution_start_date: dag run that was executed from this date
        :param execution_end_date: dag run that was executed until this date
        """