Gloas local block building cleanup (#8834)

Continuation of #8754, some small cleanups and address TODOs


  


Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>

beacon_node/beacon_chain/src/errors.rs

@@ -16,6 +16,7 @@ use milhouse::Error as MilhouseError;
 use operation_pool::OpPoolError;
 use safe_arith::ArithError;
 use ssz_types::Error as SszTypesError;
+use state_processing::envelope_processing::EnvelopeProcessingError;
 use state_processing::{
     BlockProcessingError, BlockReplayError, EpochProcessingError, SlotProcessingError,
     block_signature_verifier::Error as BlockSignatureVerifierError,
@@ -318,6 +319,8 @@ pub enum BlockProductionError {
     FailedToBuildBlobSidecars(String),
     MissingExecutionRequests,
     SszTypesError(ssz_types::Error),
+    EnvelopeProcessingError(EnvelopeProcessingError),
+    BlsError(bls::Error),
     // TODO(gloas): Remove this once Gloas is implemented
     GloasNotImplemented(String),
 }