Conditional Avalonia.Diagnostics

[PetSerAl]

Is your feature request related to a problem? Please describe.

Avalonia template include conditional package Avalonia.Diagnostics with Condition attribute directly on PackageReference element.

avalonia-dotnet-templates/templates/csharp/app/AvaloniaAppTemplate.csproj

Lines 18 to 19 in 43c5d48

	<!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
	<PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="AvaloniaVersionTemplateParameter" />

Such approach is not friendly with lock file. For example:

dotnet restore --use-lock-file -property:Configuration=Debug
dotnet restore --use-lock-file --locked-mode -property:Configuration=Release

Second command will fail with NU1004 error.

Describe the solution you'd like

Move conditional attribute to metadata IncludeAssets and PrivateAssets:

<PackageReference Include="Avalonia.Diagnostics" Version="AvaloniaVersionTemplateParameter">
  <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
  <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
</PackageReference>

That exclude assembly from Release build output, but allows restore with --locked-mode.

Describe alternatives you've considered

No response

Additional context

No response