add expire_in: 3 days to artifacts

shared-ci.yml

@@ -51,11 +51,15 @@ image: registry.git.cccv.de/infra/packages/docker-images/utility
   resource_group: build
   dependencies: []
   needs: []
+  artifacts:
+    expire_in: 3 days
 
 .package:
   rules:
   - if: '$RUN_AUTOUPDATE != "1"'
   stage: package
+  artifacts:
+    expire_in: 3 days
 
 .package:apt:
   extends: .package