add pipeline graph split script (#3275)
add pipeline graph split script (#3275)

* pipeline graph cut

* add element type

* add input wait event and shape info

* shape inference

* support multiple cuts

* format script

* address feedback

* address feedback
microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime