Add gnark mimc

[matkt]

Add gnark mimc to the besu native project

Tested if we have memory link thanks to Visual VM and it's fine

 public static void main(String[] args) {
        for (int j = 0; j < 1000000000; j++) {
            MutableBytes input = MutableBytes.of(new byte[Bytes32.SIZE*16]);
            for (int i = 0; i < 16; i++) {
                input.set(Bytes32.SIZE*(i+1)-i,((byte)((byte) i+(byte) j)));
            }
            byte[] output = new byte[Bytes32.SIZE];
            LibMimc.compute(input.toArrayUnsafe(), input.size(), output);
            System.out.println(Bytes32.wrap(output));
        }

    }

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[garyschulte]

🚢