ci_tepmlate: disable the msys job again

Its still broken and keeps haning randomly... 😢️

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-ci/-/merge_requests/284>

gitlab/ci_template.yml

@@ -501,6 +501,10 @@ build vs2017 x86:
 build msys2 :
   extends: '.build windows'
   timeout: '60min'
+  rules:
+    - if: '$CI_PROJECT_NAME !~ /^(cerbero|gst-docs|gst-integration-testsuites|gst-omx|gst-plugins-rs|gstreamer-vaapi)$/'
+      allow_failure: true
+      when: 'manual'
   script:
     # Sometimes there's seems to be an existing gst-build clone that comes either from the ether or
     # from a previous job due to some gitlab bug or implicit behavior?