Deneb Devnet 6

[realbigsean]

Description

Devnet v6 spec: https://notes.ethereum.org/@bbusa/dencun-devnet-6
Specs: https://github.com/ethereum/consensus-specs/releases/tag/v1.4.0-alpha.1
Spec tests: https://github.com/ethereum/consensus-spec-tests/releases/tag/v1.4.0-alpha.1

Consensus Changes:

• Change excess_data_gas and data_gas_used type from uint256 to uint64 ethereum/consensus-specs#3392
• Add data_gas_used field to ExecutionPayload ethereum/consensus-specs#3391
• Use engine_newPayloadV3 to pass versioned_hashes to EL for validation ethereum/consensus-specs#3359
• Update the endianness of the polynomial commitments to be big endian ethereum/consensus-specs#3354

Engine API Changes:

• Update PayloadV3 with data gas used ethereum/execution-apis#417
• Engine API: validate blob versioned hashes ethereum/execution-apis#407
• Assert array items in BlobsBundleV1 to be of same length ethereum/execution-apis#404

Execution:

• Update EIP-4844: de-sszify spec ethereum/EIPs#6985

[realbigsean]

completed in #4404