### 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.
"""Test calling decorated function 21 times in a DAG"""
        @task_decorator
        def __do_run():
            return 4
        with self.dag:
            __do_run()
            for _ in range(20):
                __do_run()
        assert self.dag.task_ids[-1] == "__do_run__20"
    def test_multiple_outputs(self):
        """Tests pushing multiple outputs as a dictionary"""
        @task_decorator(multiple_outputs=True)
        def return_dict(number: int):
            return {"number": number + 1, "43": 43}
        test_number = 10
        with self.dag:
            ret = return_dict(test_number)
        dr = self.dag.create_dagrun(
            run_id=DagRunType.MANUAL,
            start_date=timezone.utcnow(),
            execution_date=DEFAULT_DATE,
            state=State.RUNNING,
        )
        ret.operator.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE)
        ti = dr.get_task_instances()[0]
        assert ti.xcom_pull(key="number") == test_number + 1
        assert ti.xcom_pull(key="43") == 43
        assert ti.xcom_pull() == {"number": test_number + 1, "43": 43}
    def test_default_args(self):