MEV-Boost withdrawal bug

Currently, MEV-Boost selects the highest bid, in terms of value, from a collection of bids submitted by associated relays for a specific slot. This value denotes the quantity of ETH a builder pays to a proposer in return for acquiring the proposer's block space for execution. Relays determine this value by comparing the balance of the fee_recipient after the execution payload is processed to the balance before execution. This approach encounters challenges when a block includes consensus-layer withdrawals to the fee_recipient intended for payment by the builder, as it artificially increases the perceived value of the payload. See [here](https://notes.ethereum.org/@ralexstokes/mbip-0) for more details and [here](https://hackmd.io/@dataalways/HkUH7hZ26) for a detailed analysis of effects on proposers.