When `tokio::time::Interval::poll_tick()` returns `Poll::Pending`, it
schedules itself for being woken up again through the waker of the
passed context, which is correct behavior.
However when `Poll::Ready(_)` is returned, the interval timer should be
reset but not scheduled to be woken up again as this is up to the
caller.
This commit fixes the bug by introducing a `reset_without_reregister`
method on `TimerEntry` which is called by `Intervall::poll_tick(cx)` in
case the delay poll returns `Poll::Ready(_)`.
Co-authored-by: Simon B. Gasse <[email protected]>
