Fix DSM Kafka Benchmark (#8857)

* test fetching artifacts from gitlab

* forgot stage

* try again

* pass the correct variables to the benchmark runner

Author: randomanderson

.gitlab/benchmarks.yml

@@ -97,6 +97,10 @@ benchmarks-post-results:
       - platform/artifacts/
     expire_in: 3 months
   variables:
+    UPSTREAM_PROJECT_ID: $CI_PROJECT_ID # The ID of the current project. This ID is unique across all projects on the GitLab instance.
+    UPSTREAM_PROJECT_NAME: $CI_PROJECT_NAME # "dd-trace-java"
+    UPSTREAM_BRANCH: $CI_COMMIT_REF_NAME # The branch or tag name for which project is built.
+    UPSTREAM_COMMIT_SHA: $CI_COMMIT_SHA # The commit revision the project is built for.
     FF_USE_LEGACY_KUBERNETES_EXECUTION_STRATEGY: "true"
 
 dsm-kafka-producer-benchmark: