### 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)

) -> None:
        """
        Make an XCom available for tasks to pull.
        :param key: Key to store the value under.
        :param value: Value to store. What types are possible depends on whether
            ``enable_xcom_pickling`` is true or not. If so, this can be any
            picklable object; only be JSON-serializable may be used otherwise.
        :param execution_date: Deprecated parameter that has no effect.
        """
        if execution_date is not None:
            self_execution_date = self.get_dagrun(session).execution_date
            if execution_date < self_execution_date:
                raise ValueError(
                    f"execution_date can not be in the past (current execution_date is "
                    f"{self_execution_date}; received {execution_date})"
                )
            elif execution_date is not None:
                message = "Passing 'execution_date' to 'TaskInstance.xcom_push()' is deprecated."
                warnings.warn(message, RemovedInAirflow3Warning, stacklevel=3)
        XCom.set(
            key=key,
            value=value,
            task_id=self.task_id,
            dag_id=self.dag_id,
            run_id=self.run_id,
            map_index=self.map_index,
            session=session,
        )
    @provide_session
    def xcom_pull(