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Hey all, quick question
So the default task_runner in prefect 3 is the Threadpool runner, what happens when we submit an async function ? is it still run within a thread ? what's the best way to execute async tasks in prefect 3 ?

looking at the code, it seems like async tasks are indeed wrapped then executed within a thread:

```        if task.isasync:
            # TODO: Explore possibly using a long-lived thread with an event loop
            # for better performance
            future = self._executor.submit(
                context.run,
                asyncio.run,
                run_task_async(**submit_kwargs),
            )
        else:
            future = self._executor.submit(
                context.run,
                run_task_sync,
                **submit_kwargs,
            )```
I can run them on the flow directly using:
```asyncio.gather(*(my_task(xx) for xx in xxs))```
but then I would lose the `PrefectFuture` interface and the dependency between tasks in the UI