Run poetry smoke test here in the CI

Because poetry contains a patch which has to be kept in sync
with the rpm_wheels patch here.

tests/tests.yml

@@ -41,11 +41,14 @@
     - smoke312:
         dir: python/smoke
         run: VERSION=3.12 METHOD=virtualenv ./venv.sh
+    - smoke_poetry:
+        run: poetry new smoke && cd smoke && poetry config --local virtualenvs.options.no-pip true && poetry add pello && poetry run pello_greeting
     - rpm_qa:
         run: rpm -qa | sort
     required_packages:
     - gcc
     - virtualenv
+    - poetry
     - python2.7
     - python3.6
     - python3.7