chore(pectra): Use pectra devnet-4 compatible geth/prysm/mev-boost-relay

[ryanschneider]

We need to use the pectra branches of prysm and geth to build the correct genesis blocks. Currently their branches support devnet-4, which was also the version used for the "mekong" testnet that was active over devcon.

Unfortunately geth development is happening at https://github.com/lightclient/go-ethereum/tree/prague-devnet-4 so we have to use a replace directive in go.mod to point to his fork until it's merged.

However when using the proper binaries, I was able to run the pectra chain in the playground! (I didn't even bother trying rbuilder since we're on reth 1.1.1 which isn't at the right devnet level).

go run main.go --watch-payloads --use-bin-path --use-reth-for-validation --electra --genesis-delay 30

Aside: I had to raise the genesis delay as lighthouse only logs genesis block hash differences if the genesis timestamp hasn't happened yet, and 5s wasn't long enough to get it to log.

Versions used:

> lighthouse --version
Lighthouse v5.3.0-def2498
BLS library: blst
BLS hardware acceleration: true
SHA256 hardware acceleration: false
Allocator: jemalloc
Profile: release
Specs: mainnet (true), minimal (false), gnosis (false)

> reth --version
reth Version: 1.1.2
Commit SHA: 28ef5749e759a2b2c17260369fac2c6adb116bf9
Build Timestamp: 2024-12-03T00:22:59.868128000Z
Build Features: asm_keccak,jemalloc
Build Profile: release

These versions were pulled from the EF devops mekong configs:

https://github.com/ethpandaops/mekong-devnets/blob/master/ansible/inventories/devnet-0/group_vars/all/images.yaml

[ferranbt]

Can you check CI failing?