EIP-7742 Uncouple blob count between CL and EL

[daniellehrner]

Implement EIP-7742 for Pectra as specified here: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-7742.md

[siladu]

@daniellehrner Are you planning to look at this yourself or does it need triaging?

[daniellehrner]

The timeline is unclear on this. I think for the time being it's not urgent. So unfortunately I don't know yet if I'll work on it or not.

[siladu]

Engine API changes: ethereum/execution-apis#574

Incoming potential changes:

• Update EIP-7742: update the required EL headers and the gas fee mecha… ethereum/EIPs#8979
• Update EIP-7742: update the required EL headers and the gas fee mechanism ethereum/EIPs#8994

Targeted for https://notes.ethereum.org/@ethpandaops/pectra-devnet-5

[macfarla]

teku impl https://github.com/Consensys/teku/tree/electra-devnet-5

[siladu]

This was removed from Pectra (essentially replaced by #8026)