EIP 7917 (#15129)

* Add the new Fulu state with the new field

* fix the hasher for the fulu state

* Fix ToProto() and ToProtoUnsafe()

* Add the fields as shared

* Add epoch transition code

* short circuit the proposer cache to use the state

* Marshal the state JSON

* update spectests to 1.6.0-alpha.1

* Remove deneb and electra entries from blob schedule

This was cherry picked from PR #15364
and edited to remove the minimal cases

* Fix minimal tests

* Increase deadling for processing blocks in spectests

* Preston's review

* review

---------

Co-authored-by: terence tsao <terence@prysmaticlabs.com>

beacon-chain/db/kv/state.go

@@ -518,7 +518,7 @@ func (s *Store) unmarshalState(_ context.Context, enc []byte, validatorEntries [
 
 	switch {
 	case hasFuluKey(enc):
-		protoState := &ethpb.BeaconStateElectra{}
+		protoState := &ethpb.BeaconStateFulu{}
 		if err := protoState.UnmarshalSSZ(enc[len(fuluKey):]); err != nil {
 			return nil, errors.Wrap(err, "failed to unmarshal encoding for Fulu")
 		}
@@ -690,7 +690,7 @@ func marshalState(ctx context.Context, st state.ReadOnlyBeaconState) ([]byte, er
 		}
 		return snappy.Encode(nil, append(ElectraKey, rawObj...)), nil
 	case version.Fulu:
-		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateElectra)
+		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateFulu)
 		if !ok {
 			return nil, errors.New("non valid inner state")
 		}