Add Windows to nativeAOT template integration test

[morning4coffe-dev]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Description of Change

Added integration test for Windows nativeAOT template in AOTTemplateTest.

Part of #31227

[Copilot]

Pull Request Overview

This PR adds Windows platform support to the existing nativeAOT template integration tests. The change enables testing of nativeAOT compilation for Windows applications alongside the existing iOS and macOS tests.

Key changes:

• Added Windows test cases for both win-x64 and win-arm64 runtime identifiers
• Implemented platform-specific build properties for Windows nativeAOT builds
• Added platform detection logic to run tests only on appropriate host systems

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/TestUtils/src/Microsoft.Maui.IntegrationTests/Utilities/BuildWarningsUtilities.cs	Added Windows-specific expected warnings collection and reorganized public properties
src/TestUtils/src/Microsoft.Maui.IntegrationTests/AOTTemplateTest.cs	Extended test cases to include Windows platforms and added Windows-specific build configuration

[simonrozsival]

@morning4coffe-dev I believe we need to modify eng/pipelines/handlers.yml to actually run the AOT category of tests on Windows in CI.

[jsuarezruiz]

Have a couple of errors passing the build AOT tests:

Failed PublishNativeAOTRootAllMauiAssemblies("maui","net9.0-windows10.0.19041.0","win-arm64") [4 s]
  Error Message:
     Project PublishNativeAO1380391994.csproj failed to build. Check test output/attachments for errors.
  Expected: True
  But was:  False

  Stack Trace:
     at Microsoft.Maui.IntegrationTests.AOTTemplateTest.PublishNativeAOTRootAllMauiAssemblies(String id, String framework, String runtimeIdentifier) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AOTTemplateTest.cs:line 91
   at InvokeStub_AOTTemplateTest.PublishNativeAOTRootAllMauiAssemblies(Object, Span`1)

1)    at Microsoft.Maui.IntegrationTests.AOTTemplateTest.PublishNativeAOTRootAllMauiAssemblies(String id, String framework, String runtimeIdentifier) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AOTTemplateTest.cs:line 91
   at InvokeStub_AOTTemplateTest.PublishNativeAOTRootAllMauiAssemblies(Object, Span`1)

Could you review it?

[morning4coffe-dev]

@jsuarezruiz Thanks! Yeah, I am currently looking into those. I am wondering, if we are able to test the win-arm64 template with a x64 device? Or do you know if there are any limitations to that?