setup.py uses sys.executable to locate python312.lib, causing build failure in venv

my Python 3.12.10 with virtualenv

bug cause line:
https://github.com/intel/llm-scaler/blob/70ce9e3696cf86ed03f4cb9f497da3ffca3ec77a/omni/omni_xpu_kernel/setup.py#L146

result:
```
sys.executable ==> C:\ComfyUI\venv\Scripts\python.exe
sys.prefix ==> C:\ComfyUI\venv
sys.base_prefix ==> C:\Users\narat\AppData\Local\Programs\Python\Python312
```

so i think we should use this code
`python_lib_dir = str(Path(sys.base_prefix) / "libs")`

i'm not sure, would be good if someone testing this my code
thanks you