Update AZURE - OpenVINO ONNX CI check (#6721)

* experiment

* save

* Undo exeprimental changes

ngraph/python/tests/test_onnx/model_zoo_preprocess.sh

@@ -63,7 +63,7 @@ function pull_and_postprocess_onnx_model_zoo() {
     git fetch
     git reset HEAD --hard
 
-    git checkout $ONNX_SHA
+    git checkout -f $ONNX_SHA
 
     echo "Pulling models data via Git LFS for onnx model zoo repository"
     git lfs pull --include="*" --exclude="*.onnx"