[CI] Always trigger set-variables to prevent errors

.gitlab-ci.yml

@@ -58,16 +58,11 @@ set-variables:
   # If there are changes in any of the files and folders of 'pica-*' or
   # 'meta-*', then propose a manual build
   rules:
-    - changes:
-      - "pica-*/Dockerfile"
-      - "pica-*/clair-whitelist.yml"
-      - "meta-*/Dockerfile"
-      - "meta-*/clair-whitelist.yml"
-      when: always
     - changes:
       - "pica-*/**"
-      when: manual
+      when: always
       allow_failure: true
+    - when: never
 
 # Build the image that was modified
 build: