Add no-hash-maps tests to gated CI checks (#1556)

Forgot to flag this in #1521 so adding in a follow-up.

Author: alexcrichton

.github/workflows/main.yml

@@ -265,6 +265,7 @@ jobs:
       - verify-publish
       - test_capi
       - test_extra_features
+      - test-no-hash-maps
     if: always()
 
     steps: