(ci) Only run unit tests in all Py jobs except 3.11 (#441)

Run all tests (unit and integration) in the tests:3.11:cov job
so they are counted and summed-up for the coverage statistics

.gitlab-ci.yml

@@ -107,7 +107,7 @@ pre-commit:hooks:
   image: $DOCKER_IMAGE/$PYTHON_VERSION:latest
   script:
     - poetry install
-    - poetry run pytest
+    - poetry run pytest tests/unit
 
 tests:3.7:
   extends: .tests