set ci env to the same value as for integration tests

Author: anmarchenko

.github/workflows/test.yml

@@ -85,7 +85,7 @@ jobs:
       BUNDLE_WITHOUT: docs
       DD_PROFILING_NO_EXTENSION: true
       DD_CIVISIBILITY_AGENTLESS_ENABLED: true
-      DD_TRACE_DEBUG: true
+      DD_ENV: prod
       DD_API_KEY: ${{ secrets.DD_API_KEY }}
     steps:
       - uses: actions/checkout@v3