ruff torch backend (#9341)

.github/workflows/test.yml

@@ -161,6 +161,10 @@ jobs:
       run: |
         sudo apt update || true
         sudo apt install -y --no-install-recommends ninja-build
+    - name: Lint with ruff
+      run: |
+        pip3 install --upgrade --force-reinstall ruff
+        python3 -m ruff check extra/torch_backend/backend.py
     - name: Test one op
       run: PYTHONPATH=. FORWARD_ONLY=1 TINY_BACKEND=1 python3 test/test_ops.py TestOps.test_add
     - name: Test ResNet-18