Can not publish WinUI 3 app for ARM64 architecture with WAP project

[aries-zhang]

Describe the bug

In VisualStudio Version 17.12.0 Preview 2.0, The RuntimeIdentifier platform 'win-x64' and the PlatformTarget 'arm64' must be compatible. is thrown when attempting to publish a blank WinUI 3 app with Debug (ARM64) config using a WAP project.

Steps to reproduce the bug

1. Update to VisualStudio Version 17.12.0 Preview 2.0.
2. Create a blank WinUI 3 app with template "Blank App, Packaged with Windows Application Packaging Project (WinUI 3 in Desktop)".
3. Build and publish the project with steps mentioned in this issue: WinUI 3 blank app packaged with WAP project does not start when published #9996
4. Choose only ARM64, "Debug ARM64" in the publish dialog
   
5. The error message is shown:
   

Expected behavior

The package should be able to successfully publish.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.6.0: 1.6.240829007

Windows version

Windows 11 (22H2): Build 22621

Additional context

This is to try to workaround the issue here #9996, while the other issue mentioned VS 17.12 has a fix: #9740 (comment).

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