### 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.
:param multiple_outputs: If set to True, the decorated function's return
        value will be unrolled to multiple XCom values. Dict will unroll to XCom
        values with its keys as XCom keys. If set to False (default), only at
        most one XCom value is pushed.
    :param decorated_operator_class: The operator that executes the logic needed
        to run the python function in the correct environment.
    Other kwargs are directly forwarded to the underlying operator class when
    it's instantiated.
    """
    if multiple_outputs is None:
        multiple_outputs = cast(bool, attr.NOTHING)
    if python_callable:
        decorator = _TaskDecorator(
            function=python_callable,
            multiple_outputs=multiple_outputs,
            operator_class=decorated_operator_class,
            kwargs=kwargs,
        )
        return cast(TaskDecorator, decorator)
    elif python_callable is not None:
        raise TypeError("No args allowed while using @task, use kwargs instead")
    def decorator_factory(python_callable):
        return _TaskDecorator(
            function=python_callable,
            multiple_outputs=multiple_outputs,
            operator_class=decorated_operator_class,
            kwargs=kwargs,
        )
    return cast(TaskDecorator, decorator_factory)