Function network::fuzzing::fuzz_network_handshake_protocol_negotiation

pub fn fuzz_network_handshake_protocol_negotiation(
    self_handshake: &HandshakeMsg,
    remote_handshake: &HandshakeMsg
)

Same function as fuzz_network_handshake_protocol_exchange except that the network exchange is skipped, letting us skip BCS deserialization (and potentially other logic) and fuzz the negotiation of protocols directly.