Check for Python_EXECUTABLE in pyxir.cmake to fix Vitis AI EP build (#8631)
Check for Python_EXECUTABLE in pyxir.cmake to fix Vitis AI EP build (#8631)

Co-authored-by: Jorn Tuyls <85c685e37414b845ba44991b0e8faa2864fd1eb9@gmail.com>
microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime,microsoft/onnxruntime