p3: Inconsistent behavior in sockets/udp send

[saulecabrera]

With the latest Wasmtime dev version, the following test:

async fn test_wrong_address_family(family: IpAddressFamily) {
    let sock = UdpSocket::create(family).unwrap();

    let addr = match family {
        IpAddressFamily::Ipv4 => IpSocketAddress::localhost(IpAddressFamily::Ipv6, 0),
        IpAddressFamily::Ipv6 => IpSocketAddress::localhost(IpAddressFamily::Ipv4, 0),
    };

    let result = sock.send(vec![0; 1], Some(addr)).await;
    assert!(matches!(result, Err(ErrorCode::InvalidArgument)));
}

Passes on macOS, but fails on Ubuntu/Windows.

According to the spec: invalid-argument should be returned if the remote-address has the wrong address family. (EAFNOSUPPORT)

[saulecabrera]

For completeness, this is the error on Ubuntu:

[src/bin/sockets-udp-send.rs:21:5] &result = Err(
    ErrorCode {
        code: 2,
        name: "not-supported",
        message: "The operation is not supported.\n\n          POSIX equivalent: EOPNOTSUPP",
    },
)