onnxruntime

a6ce7b33 - Enable model subgraph execution in OVEP and setting the OpenVINO dll's to the path from the OpenVINO pypi packge in OVEP and fix OVEP windows io buffer sample (#16147)

Enable model subgraph execution in OVEP and setting the OpenVINO dll's to the path from the OpenVINO pypi packge in OVEP and fix OVEP windows io buffer sample (#16147) ### Description This PR enables execution of subgraphs in OVEP and currently, when OVEP developers install the onnxruntime-openvino package on windows from pypi, they would have to additionally download OpenVINO windows binaries and run the setupvars.bat script which sets the environment PATH to locate the OV dll's. Also this PR fixes issues of OVEP windows io buffer sample. ### Motivation and Context Fix: We want to make the user experience easy for OVEP Python developers on windows platform. This fix, introduces a function add_openvino_libs_to_path at the location tools/python/util/add_openvino_win_libs.py. The above function, can be called by OVEP python users in the application code and that takes care of setting the OpenVINO dll's to the path from the OpenVINO pypi packge (openvino) which was installed. This change also makes sure that add_openvino_libs_to_path() function is added to onnxruntime python package only when it is build for OpenVINO Execution Provider for ONNXRuntime and not for default ORT python package builds. New user experience for Python OVEP developers on windows platform: step 1: pip install onnxruntime-openvino step 2: pip install openvino step 3: <Add these 2 lines in the application code> import onnxruntime.tools.add_openvino_win_libs as utils utils.add_openvino_libs_to_path() --------- Signed-off-by: MaajidKhan <n.maajid.khan@intel.com> Co-authored-by: MaajidKhan <n.maajid.khan@intel.com> Co-authored-by: Suryaprakash Shanmugam <suryaprakash.shanmugam@intel.com>