Ignore software adapters from DML device enumeration and use DXGI enumeration instead of dxcore

[PatriceVignola]

There are 2 changes in this PR:

1. Ignore software adapters like WARP and remote desktop from the enumeration. There's a weird behavior with these adapters where they will show up first no matter what, even if the HighPerformance enumeration is requested. This can cause very slow execution when using remote desktop, or simply if a device decides to enumerate the WARP software emulation device first.
2. Use DXGI instead of DXCORE. DXGI works everywhere that dxcore works (except for Linux), but DXGI is supported on a wider range of Windows machines going back to the early days of Windows 10. This should allow the enumeration to work on far more devices.

[yufenglee]

Does it fix this issue: #336