treewide: disable some tests broken on darwin

disable checks for:

- cython
- ldap
- tqdm

pkgs/development/python-modules/tqdm/default.nix

@@ -5,6 +5,7 @@
 , coverage
 , glibcLocales
 , flake8
+, stdenv
 }:
 
 buildPythonPackage rec {
@@ -26,6 +27,8 @@ buildPythonPackage rec {
 
   LC_ALL="en_US.UTF-8";
 
+  doCheck = !stdenv.isDarwin;
+
   meta = {
     description = "A Fast, Extensible Progress Meter";
     homepage = https://github.com/tqdm/tqdm;