Skip benchmarks on release (#8363)

Author: randomanderson

.gitlab/benchmarks.yml

@@ -8,6 +8,9 @@
   rules:
     - if: '$POPULATE_CACHE'
       when: never
+    - if: '$CI_COMMIT_TAG =~ /^v?[0-9]+\.[0-9]+\.[0-9]+$/'
+      when: manual
+      allow_failure: true
     - when: on_success
   script:
     - export ARTIFACTS_DIR="$(pwd)/reports" && mkdir -p "${ARTIFACTS_DIR}"