blockchain/vm: add chainId opcode (eip1344)

[yoomee1313]

Proposed changes

• This PR contains istanbul hardfork item. It is not activated yet since istanbulCompatible block number is set nil.
• This PR is derived from eip1344.
• ChainId has been supported since Solidity 8.0. If you're using solidity under 8.0, you can get the chainId by calling 0x46 opcode in assembly code.

solidity 8.0 example code

pragma solidity >=0.7.0 <0.9.0;

contract ChainIDTest {
    uint256 chainID;
    // sendTransaction
    function blockCall() public {
        chainID = block.chainid;
    }
    function getChainID() public view returns (uint256) {
        return chainID;
    }
    // call
    function blockViewCall() public view returns (uint256) {
        return block.chainid;
    }
    function assemblyViewCall() public view returns (uint256) {
        uint256 id;
        assembly {
            id := chainid()
        }
        return id;
    }
}

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