Update BLS12381 compiles according to Prague #408
Description
Rationale
The EIP-2537 has been updated and finally released in Geth v0.15.0. Since we built our DKG on its old version, we need an update to keep the same, so that BLS12381 related contracts from Ethereum can run on Neo X correctly.
Implementation
Ref ethereum/EIPs#8945 and ethereum/go-ethereum#30978.
The BLS12_G1MUL and BLS12_G2MUL precompiles were removed, but there is an equivalent interoperability through MSM. We use BLS12_G1MUL in DKG, so the contract needs a update as well.