EVM/Exec: implement EIP-3860
See https://eips.ethereum.org/EIPS/eip-3860.
Basically:
We extend EIP-170 by introducing a maximum size limit for initcode (MAX_INITCODE_SIZE = 2 * MAX_CODE_SIZE = 49152).
Furthermore, we introduce a charge of 2 gas for every 32-byte chunk of initcode to represent the cost of jumpdest-analysis.