Add allow_failure to windows tests

.gitlab-ci.yml

@@ -90,18 +90,21 @@ windows_test_python36:
   extends: .windows_base_python36
   dependencies:
     - windows_wheel_python36
+  allow_failure: true
 
 windows_test_python37:
   <<: *test_noqt_template_defintion
   extends: .windows_base_python37
   dependencies:
     - windows_wheel_python37
+  allow_failure: true
 
 windows_test_python38:
   <<: *test_noqt_template_defintion
   extends: .windows_base_python38
   dependencies:
     - windows_wheel_python38
+  allow_failure: true
 
 
 .test_macos_noqt_template: &test_macos_noqt_template_defintion