### 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.
"""Declaration of a @task-decorated callable for type-checking.
    An instance of this type inherits the call signature of the decorated
    function wrapped in it (not *exactly* since it actually returns an XComArg,
    but there's no way to express that right now), and provides two additional
    methods for task-mapping.
    This type is implemented by ``_TaskDecorator`` at runtime.
    """
    __call__: Callable[FParams, XComArg]
    function: Callable[FParams, FReturn]
    @property
    def __wrapped__(self) -> Callable[FParams, FReturn]:
        ...
    def partial(self, **kwargs: Any) -> Task[FParams, FReturn]:
        ...
    def expand(self, **kwargs: OperatorExpandArgument) -> XComArg:
        ...
    def expand_kwargs(self, kwargs: OperatorExpandKwargsArgument, *, strict: bool = True) -> XComArg:
        ...
    def override(self, **kwargs: Any) -> Task[FParams, FReturn]:
        ...
class TaskDecorator(Protocol):