Capella eip 4844 cleanup (#3652)

* add capella gossip boiler plate

* get everything compiling

Co-authored-by: realbigsean <sean@sigmaprime.io
Co-authored-by: Mark Mackey <mark@sigmaprime.io>

* small cleanup

* small cleanup

* cargo fix + some test cleanup

* improve block production

* add fixme for potential panic

Co-authored-by: Mark Mackey <mark@sigmaprime.io>

beacon_node/beacon_chain/src/errors.rs

@@ -263,6 +263,7 @@ pub enum BlockProductionError {
     MissingExecutionPayload,
     TokioJoin(tokio::task::JoinError),
     BeaconChain(BeaconChainError),
+    InvalidPayloadFork,
 }
 
 easy_from_to!(BlockProcessingError, BlockProductionError);