[VitisAI] Wrong model path after using std::filesystem::path

[BoarQing]

Describe the issue

after https://github.com/microsoft/onnxruntime/pullafter /20920, the onnxruntime with provider option --use-vitisai can't be compiled.
In addition, It is using the model path instead of path we specified(l(usually an intermediate model during graph transformation for debugging).

We highly recommended that the onnxruntime's CI can be tested with --use-vitisai, at least for compile.

To reproduce

No need to reproduce.

Urgency

No response

Platform

Windows

OS Version

Win 11

ONNX Runtime Installation

Built from Source

ONNX Runtime Version or Commit ID

main

ONNX Runtime API

C++

Architecture

X64

Execution Provider

Vitis AI

Execution Provider Library Version

No response

[BoarQing]

@snnn

[BoarQing]

Sample compile error:

[snnn]

Should have been fixed by #21247

[BoarQing]

Should have been fixed by #21247
No. This only solves the compile issue

[BoarQing]

Should have been fixed by #21247

#21293
Could you review this PR that address the issue mentioned on the title.