std.Io.Threaded: implement netInterfaceName

[andrewrk]

Extracted from #25592.

fn netInterfaceName(userdata: ?*anyopaque, interface: net.Interface) net.Interface.NameError!net.Interface.Name {
    const t: *Threaded = @ptrCast(@alignCast(userdata));
    try t.checkCancel();

    if (native_os == .linux) {
        _ = interface;
        @panic("TODO implement netInterfaceName for linux");
    }

    if (native_os == .windows) {
        @panic("TODO implement netInterfaceName for windows");
    }

    if (builtin.link_libc) {
        @panic("TODO implement netInterfaceName for libc");
    }

    @panic("unimplemented");
}