Docs: replace invalid ExecutionProvider.DeviceType references in FindAllProviders examples

[Copilot]

ExecutionProviderCatalog.FindAllProviders docs showed sample code using ExecutionProvider.DeviceType, which is not part of the ExecutionProvider API surface. This updates the examples to use a valid, documented property so the samples are compile-/runtime-consistent.

• Problem addressed

  • FindAllProviders samples in C#, C++/WinRT, and Python referenced DeviceType/device_type, which does not exist on ExecutionProvider.

• Documentation updates

  • Updated all three language samples in executionprovidercatalog_findallproviders_2058491835.md to report LibraryPath instead:
    • C#: provider.LibraryPath
    • C++/WinRT: provider.LibraryPath()
    • Python: provider.library_path

• Example (updated pattern)

var catalog = Microsoft.Windows.AI.MachineLearning.ExecutionProviderCatalog.GetDefault();
var providers = catalog.FindAllProviders();

foreach (var provider in providers)
{
    Console.WriteLine($"Found provider: {provider.Name}, Library path: {provider.LibraryPath}");
}

• Fixes Docs: No DeviceType in ExecutionProvider (Microsoft.Windows.AI.MachineLearning) #121