N/A
2 changes:
1. Replace Option::map_or(true, ...) with is_none_or(...)
2. Remove unnecessary `Into::into` blocks where the type conversion is apparent from the types
add HTTP API to the beacon node to retrieve IL from the EL.
add IL service in the validator client to download the IL from the beacon node.
add logic to the beacon node to package the IL for the validator client.
add HTTP API to the beacon node to gossip signed ILs.
the validator client will sign the ILs from the beacon node and resubmit to the beacon node to gossip.
