[build] Add support for Visual Studio on win-arm64

Context: #11090
Context: https://github.com/xamarin/yaml-templates/pull/204
Context: dotnet/android#7471
Context: xamarin/xamarin-macios#16935

Updates the VSMAN files generated for our .NET workload to support
Visual Studio on windows-arm64.

eng/automation/vs-workload.template.props

@@ -27,7 +27,7 @@
  <ComponentResources Include="maui-maccatalyst" Version="@VS_COMPONENT_VERSION@" Category=".NET" Title=".NET MAUI SDK for Mac Catalyst" Description=".NET SDK Workload for building MAUI applications that target Mac Catalyst." />
  <ComponentResources Include="maui-ios" Version="@VS_COMPONENT_VERSION@" Category=".NET" Title=".NET MAUI SDK for iOS" Description=".NET SDK Workload for building MAUI applications that target iOS." />
  <ComponentResources Include="maui-windows" Version="@VS_COMPONENT_VERSION@" Category=".NET" Title=".NET MAUI SDK for Windows" Description=".NET SDK Workload for building MAUI applications that target Windows." />
- <WorkloadPackages Include="$(NuGetPackagePath)\Microsoft.NET.Sdk.Maui.Manifest*.nupkg" Version="@VS_COMPONENT_VERSION@" />
+ <WorkloadPackages Include="$(NuGetPackagePath)\Microsoft.NET.Sdk.Maui.Manifest*.nupkg" Version="@VS_COMPONENT_VERSION@" SupportsMachineArch="true" />
  <MultiTargetPackNames Include="Maui.Sdk;Maui.Templates" />
  </ItemGroup>
 </Project>