### Description

Add listeners for Datasets (events)

### Use case/motivation

As Airflow administrators, we would like to trigger some external processes based on all datasets being created/updated by our users. We came across the listeners for the dag runs and task instances (which are also useful), but are still missing listeners for datasets.

### Related issues

_No response_

### 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)

warnings.warn(
                "Param `schedule_interval` is deprecated and will be removed in a future release. "
                "Please use `schedule` instead. ",
                RemovedInAirflow3Warning,
                stacklevel=2,
            )
        if timetable is not None:
            warnings.warn(
                "Param `timetable` is deprecated and will be removed in a future release. "
                "Please use `schedule` instead. ",
                RemovedInAirflow3Warning,
                stacklevel=2,
            )
        self.timetable: Timetable
        self.schedule_interval: ScheduleInterval
        self.dataset_triggers: Collection[Dataset] = []
        if isinstance(schedule, Collection) and not isinstance(schedule, str):
            from airflow.datasets import Dataset
            if not all(isinstance(x, Dataset) for x in schedule):
                raise ValueError("All elements in 'schedule' should be datasets")
            self.dataset_triggers = list(schedule)
        elif isinstance(schedule, Timetable):
            timetable = schedule
        elif schedule is not NOTSET:
            schedule_interval = schedule
        if self.dataset_triggers:
            self.timetable = DatasetTriggeredTimetable()
            self.schedule_interval = self.timetable.summary
        elif timetable:
            self.timetable = timetable