Hipify during build instead of before cmake config (#13333)
### Description
Currently, hipify happens before cmake is configured and then cmake glob
the directories. This get rids of thoes customized python threading
logic and opt for build system itself to generate the files.
This also supersede the half baked branch
[sukha/hipify-with-cmake](https://github.com/microsoft/onnxruntime/tree/sukha/hipify-with-cmake)
