Add a python script with a number of helper actions for creating/editing/dumping onnx test runner format pb files (#2294)
Add a python script with a number of helper actions for creating/editing/dumping onnx test runner format pb files (#2294)

* Add a python script with a number of helper actions for creating/editing/dumping onnx test running format pb files.


microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime