### Body

Currently when you use multiple-outputs in decorator and it gets None value, it crashes.

As explained in https://github.com/apache/airflow/issues/32553 and workaround for ShortCircuitOperator has been implemented here:  https://github.com/apache/airflow/pull/32569 

But a more complete fix for multiple-outputs handling None is needed. 

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
task_id: str,
    dag: DAG | None = None,
    task_group: TaskGroup | None = None,
) -> str:
    """
    Generate unique task id given a DAG (or if run in a DAG context).
    IDs are generated by appending a unique number to the end of
    the original task id.
    Example:
      task_id
      task_id__1
      task_id__2
      ...
      task_id__20
    """
    dag = dag or DagContext.get_current_dag()
    if not dag:
        return task_id
    
    
    task_group = task_group or TaskGroupContext.get_current_task_group(dag)
    tg_task_id = task_group.child_id(task_id) if task_group else task_id
    if tg_task_id not in dag.task_ids:
        return task_id
    def _find_id_suffixes(dag: DAG) -> Iterator[int]: