DirectML Execution Provider Error: Unable to load D3D12Core.dll

[sjpritchard]

Describe the bug
When using the prebuilt v0.5.0 DirectML ES runtime on Windows 11 using C++, it fails with the error:

D3D Error 887e0003: (19196@617069187) at 00007FF89073B23F - Unable to load D3D12Core.dll.  Verify D3D12SDKPath is correct.
Microsoft.Direct3DSrc\D3D\module.cpp(689)\d3d12.dll!00007FF89073B263: (caller: 00007FF89073900E) LogHr(1) tid(4afc) 887E0003 The D3D12 SDK version configuration of the host exe is invalid.
    Msg:[Unable to load D3D12Core.dll.  Verify D3D12SDKPath is correct.] 

I've installed the D3D12 Agility SDK runtime files under the D3D12 folder installed in my application folder. I've tried manually setting the D3D12SDKPath environment variable with no change.

To Reproduce
Steps to reproduce the behavior:

1. Compile application with onnxruntime-genai DirectML ES
2. Run app

Expected behavior
D3D12Core.dll is able to be found, and DirectML ES loads properly.

Desktop (please complete the following information):

• OS: Windows 11 23H2 Build 22635.4440
• Agility SDK Version: 1.614.1

Additional context
Add any other context about the problem here.