Update CI benchmarks to ONNX autoinstall (ultralytics#8008)

Avoids openvino-dev conflicts

.github/workflows/ci-testing.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Install requirements
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt coremltools onnx onnxruntime openvino-dev tensorflow-cpu --extra-index-url https://download.pytorch.org/whl/cpu
+          pip install -r requirements.txt coremltools openvino-dev tensorflow-cpu --extra-index-url https://download.pytorch.org/whl/cpu
           python --version
           pip --version
           pip list