Function handle_timeout 

pub(crate) async fn handle_timeout<TYPES: NodeType, I: NodeImplementation<TYPES>>(
    view_number: ViewNumber,
    epoch: Option<EpochNumber>,
    sender: &Sender<Arc<HotShotEvent<TYPES>>>,
    task_state: &mut ConsensusTaskState<TYPES, I>,
) -> Result<()>

Handle a Timeout event.