Devnet 5

[realbigsean]

discord convo for reference https://discord.com/channels/595666850260713488/745077610685661265/1318234114964324423

• Remove EIP-7742 #6718
• Update to latest spec tests #6722

PR conga line:

• Make max_blobs_per_block a config parameter #6329
• Electra spec changes for v1.5.0-beta.0 #6731
• Execution requests with prefix #6801
• SingleAttestation implementation #6488
• Implement changes for EIP 7691 #6803

[michaelsproul]

Changes remaining for v1.5.0-beta.0 compat:

• Fix the blob subnet calc (Update blob sidecar subnet computation for EIP-7691 ethereum/consensus-specs#4067). I think this might already be done by @pawanjay176's eip7691 branch above, but I haven't had a chance to check. That branch needs a PR in the conga line too.

I think we have all the other changes already done.

Something else we need to do is to continue propagating changes up the conga line. We can probably propagate the max_blobs_per_block changes one last time before they get merged to unstable (this should reduce merge conflicts).

Pawan's PR for the engine changes also hasn't been conga'd off Eitan's SingleAttestation PR yet.