Fix localized DirectML adapter errors in Python

[Aziz Muminov (AzizMuminov)]

Summary

• Report invalid DirectML adapter requests with a stable ASCII message before the error crosses the Python boundary.
• Add a Windows + DirectML regression test for an invalid device ID.

Fixes #32082

Testing

• python3 -m py_compile onnxruntime/test/python/onnxruntime_test_python.py
• git diff --check
• Not run: the regression test requires Windows with DirectML; pytest is unavailable in this environment.

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[Copilot]

🟢 Approval recommended

The focused fix addresses the reported failure and includes appropriate regression coverage.

Pull request overview

Adds a stable ASCII error for invalid DirectML adapter IDs crossing into Python.

Changes:

• Replaces localized DXGI adapter-enumeration exceptions with an ASCII message.
• Adds a Windows DirectML regression test.

File summaries

File	Description
onnxruntime/core/providers/dml/dml_provider_factory.cc	Produces a locale-independent adapter error.
onnxruntime/test/python/onnxruntime_test_python.py	Verifies Python receives the readable error.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Balanced

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[Aziz Muminov (AzizMuminov)]

/azp run Linux Android Emulator QNN CI Pipeline

[azure-pipelines]

Commenter does not have sufficient privileges for PR 32543 in repo microsoft/onnxruntime

[Aziz Muminov (AzizMuminov)]

adrastogi Hisham Chowdhury (@hisham-hchowdhu) Could you please review this focused DirectML error-handling fix when you have a moment? It adds regression coverage for the localized Windows Python error path. The automated review found no issues; CI is awaiting maintainer authorization.