Function decide_epoch_root

async fn decide_epoch_root<TYPES: NodeType, I: NodeImplementation<TYPES>, V: Versions>(
    decided_leaf: &Leaf2<TYPES>,
    epoch_height: u64,
    membership: &Arc<RwLock<TYPES::Membership>>,
    storage: &I::Storage,
    consensus: &OuterConsensus<TYPES>,
    upgrade_lock: &UpgradeLock<TYPES, V>,
)

Handles calling add_epoch_root and sync_l1 on Membership if necessary.