Merge branch '324415-build-workhorse-once-in-setup-test-env' into 'master'

ci: Save Workhorse's WORKHORSE_TREE file to avoid re-building it

See merge request gitlab-org/gitlab!56773

.gitlab/ci/rails.gitlab-ci.yml

@@ -183,6 +183,7 @@ setup-test-env:
       - tmp/tests/gitlab-workhorse/gitlab-workhorse
       - tmp/tests/gitlab-workhorse/gitlab-resize-image
       - tmp/tests/gitlab-workhorse/config.toml
+      - tmp/tests/gitlab-workhorse/WORKHORSE_TREE
       - tmp/tests/repositories/
       - tmp/tests/second_storage/
     when: always