add artifacts

Author: faydef

.gitlab/benchmarks/microbenchmarks.yml

@@ -41,6 +41,13 @@ upload-tp-bp-ui:
     # - ./platform/steps/post-pr-comment.sh
     # Temporarely commented out pending issue resolution with sending files to backend
     - ./platform/steps/upload-to-bp-ui.sh
+
+  artifacts:
+  name: "artifacts"
+  when: always
+  paths:
+    - artifacts/
+  expire_in: 3 months
 
   rules:
     - when: manual