Merge branch 'match-any-stable-branch' into 'master'

Consider we might have prefix for stable branches

See merge request gitlab-org/gitlab-ce!19237

.gitlab-ci.yml

@@ -591,7 +591,7 @@ ee_compat_check:
   except:
     - master
     - tags
-    - /^[\d-]+-stable(-ee)?/
+    - /[\d-]+-stable(-ee)?/
     - /^security-/
     - branches@gitlab-org/gitlab-ee
     - branches@gitlab/gitlab-ee