nixos/tests/fcitx: disable

It never worked on 21.11 and still does not:
https://hydra.nixos.org/job/nixos/release-21.11/nixos.tests.fcitx.x86_64-linux/all
https://hydra.nixos.org/job/nixos/trunk-combined/nixos.tests.fcitx.x86_64-linux/all
and it frequently makes big channels wait (same on aarch64-linux).

Changed files
+1
nixos
tests
fcitx
+1
nixos/tests/fcitx/default.nix
···
# copy_from_host works only for store paths
rec {
name = "fcitx";
+
meta.broken = true; # takes hours to time out since October 2021
nodes.machine =
{
pkgs,