fix: dont use fuse::select_next_some

[mattsse]

closes foundry-rs/foundry#7652

SelectNextSome over Fuse will panic

Fuse will return

        if *this.done {
            return Poll::Ready(None);
        }

but selectsome will panic if the underlying stream already returned None once

        if let Some(item) = ready!(self.stream.poll_next_unpin(cx)) {
            Poll::Ready(item)
        } else {
            debug_assert!(self.stream.is_terminated());
            cx.waker().wake_by_ref();
            Poll::Pending
        }

[mattsse]

hmm, actually this is very weird, because the fuse stream is always marked as terminated when it returns None

which makes me think the issue is somewhere else

EDIT:

ah my bad looked at the wrong assert, it hits the first:

   fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        assert!(!self.stream.is_terminated(), "SelectNextSome polled after terminated");

        if let Some(item) = ready!(self.stream.poll_next_unpin(cx)) {
            Poll::Ready(item)
        } else {
            debug_assert!(self.stream.is_terminated());
            cx.waker().wake_by_ref();
            Poll::Pending
        }
    }

so this change fixes it