onnxruntime

a28abeb2 - Change "#ifdef WIN32" to "#ifdef _WIN32" (#19254)

Change "#ifdef WIN32" to "#ifdef _WIN32" (#19254) ### Description `_WIN32` is a standard macro listed at https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170 . But `WIN32` is not.