Update sync state status in the tree

[mattsse]

if we're syncing or no longer syncing we need to reflect this in the tree handler implementation.

ref

reth/crates/consensus/beacon/src/engine/mod.rs

Lines 1360 to 1361 in 1656327

	// we're no longer syncing
	self.sync_state_updater.update_sync_state(SyncState::Idle);

this is done by communicating with the networkhandle:

reth/crates/net/network/src/network.rs

Lines 368 to 369 in 1656327

	impl NetworkSyncUpdater for NetworkHandle {
	fn update_sync_state(&self, state: SyncState) {

this can be set during the orchestrator loop