Builder flow for Deneb & Blobs (#4428)

* Add Deneb builder flow types with generics

* Update validator client `get_blinded_blocks` call to support Deneb

* `produceBlindedBlock` endpoint updates:
- Handle new Deneb BuilderBid response from builder endpoint (new BlindedBlobsBundle type)
- Build BlockContents response (containing kzg_commitments, proof and blinded_blob_sidecars)

* Appease Clippy lint

* Partial implementation of submit blinded block & blobs. Refactor existing `BlobSidecar` related types to support blinded blobs.

* Add associated types for BlockProposal

* Rename `AbstractSidecar` to `Sidecar`

* Remove blob cache as it's no longer necessary

* Remove unnecessary enum variant

* Clean up

* Hanlde unblinded blobs and publish full block contents

* Fix tests

* Add local EL blobs caching in blinded flow

* Remove BlockProposal and move associated Sidecar trait to AbstractExecPayload to simplify changes

* add blob roots associated type

* move raw blobs associated type to sidecar trait

* Fix todos and improve error handling

* Consolidate BlobsBundle from `execution_layer` into `consensus/types`

* Rename RawBlobs, Blobs, and BlobRoots

* Use `BlobRoots` type alias

* Update error message.

Co-authored-by: realbigsean <seananderson33@GMAIL.com>

* update builder bid type

# Conflicts:
#	consensus/types/src/builder_bid.rs

* Fix lint

* remove generic from builder bid

---------

Co-authored-by: realbigsean <seananderson33@gmail.com>

beacon_node/execution_layer/src/engine_api.rs

@@ -20,16 +20,14 @@ use state_processing::per_block_processing::deneb::deneb::kzg_commitment_to_vers
 use std::convert::TryFrom;
 use strum::IntoStaticStr;
 use superstruct::superstruct;
-use types::beacon_block_body::KzgCommitments;
-use types::blob_sidecar::Blobs;
 pub use types::{
     Address, BeaconBlockRef, EthSpec, ExecutionBlockHash, ExecutionPayload, ExecutionPayloadHeader,
     ExecutionPayloadRef, FixedVector, ForkName, Hash256, Transactions, Uint256, VariableList,
     Withdrawal, Withdrawals,
 };
 use types::{
-    BeaconStateError, ExecutionPayloadCapella, ExecutionPayloadDeneb, ExecutionPayloadMerge,
-    KzgProofs, VersionedHash,
+    BeaconStateError, BlobsBundle, ExecutionPayloadCapella, ExecutionPayloadDeneb,
+    ExecutionPayloadMerge, KzgProofs, VersionedHash,
 };
 
 pub mod auth;
@@ -64,7 +62,6 @@ pub enum Error {
     IncorrectStateVariant,
     RequiredMethodUnsupported(&'static str),
     UnsupportedForkVariant(String),
-    BadConversion(String),
     RlpDecoderError(rlp::DecoderError),
     BlobTxConversionError(BlobTxConversionError),
 }
@@ -416,7 +413,7 @@ pub struct GetPayloadResponse<T: EthSpec> {
     pub execution_payload: ExecutionPayloadDeneb<T>,
     pub block_value: Uint256,
     #[superstruct(only(Deneb))]
-    pub blobs_bundle: BlobsBundleV1<T>,
+    pub blobs_bundle: BlobsBundle<T>,
     #[superstruct(only(Deneb), partial_getter(copy))]
     pub should_override_builder: bool,
 }
@@ -452,7 +449,7 @@ impl<T: EthSpec> From<GetPayloadResponse<T>> for ExecutionPayload<T> {
 }
 
 impl<T: EthSpec> From<GetPayloadResponse<T>>
-    for (ExecutionPayload<T>, Uint256, Option<BlobsBundleV1<T>>)
+    for (ExecutionPayload<T>, Uint256, Option<BlobsBundle<T>>)
 {
     fn from(response: GetPayloadResponse<T>) -> Self {
         match response {
@@ -575,13 +572,6 @@ impl<E: EthSpec> ExecutionPayloadBodyV1<E> {
     }
 }
 
-#[derive(Clone, Default, Debug, PartialEq)]
-pub struct BlobsBundleV1<E: EthSpec> {
-    pub commitments: KzgCommitments<E>,
-    pub proofs: KzgProofs<E>,
-    pub blobs: Blobs<E>,
-}
-
 #[superstruct(
     variants(Merge, Capella, Deneb),
     variant_attributes(derive(Clone, Debug, PartialEq),),