test: Adding check in GH.

.github/workflows/quality-checks.yml

@@ -80,3 +80,27 @@ jobs:
           **/reports/**/*
           test_root/log/**/*.log
           *.log
+
+    - name: Run quality tests
+      run: |
+        ruff check lms/djangoapps/ lms/envs/ lms/lib/ lms/tests.py \
+          openedx/core/djangoapps/ openedx/core/djangolib/ openedx/core/lib/ openedx/core/tests/ \
+          openedx/core/tests/ openedx/core/types/ openedx/features/ openedx/testing/ openedx/tests/ \
+          cms common xmodule --preview
+
+
+  # This job aggregates test results. It's the required check for branch protection.
+  # https://github.com/marketplace/actions/alls-green#why
+  # https://github.com/orgs/community/discussions/33579
+  success:
+    name: Ruff checks successful
+    if: always()
+    needs:
+      - run-ruff
+    runs-on: ubuntu-latest
+    steps:
+      - name: Decide whether the needed jobs succeeded or failed
+        # uses: re-actors/[email protected]
+        uses: re-actors/alls-green@05ac9388f0aebcb5727afa17fcccfecd6f8ec5fe
+        with:
+          jobs: ${{ toJSON(needs) }}