[Build][Installer]Fix NU1503 build warnings (#33938)

## Summary of the Pull Request

This PR aims for fix some CI build warnings.
## Detailed Description of the Pull Request / Additional comments

### Warning NU1503
Fix warning NU1503 for wix toolset projects marking them as restorable
and adding an empty restore target.
### No test result files matching '[ '**/*.trx' ]' were found.
Skip publishing of test results for ARM64 since pipeline isn't running
ARM64 tests

![image](https://github.com/user-attachments/assets/10a64ca2-2bff-42a8-ade9-07bd5ad88e3c)

.pipelines/ci/templates/build-powertoys-steps.yml

@@ -246,7 +246,7 @@ steps:
   inputs:
     testResultsFormat: VSTest
     testResultsFiles: '**/*.trx'
-  condition: always()
+  condition: ne(variables['BuildPlatform'],'arm64')
 
 # Native dlls
 - task: VSTest@2

installer/PowerToysSetup/PowerToysBootstrapper.wixproj

@@ -76,4 +76,12 @@
     <Error Condition="!Exists('..\wix.props')"
       Text="$([System.String]::Format('$(ErrorText)', '..\wix.props'))" />
   </Target>
+
+  <!-- Prevents NU1503 -->
+  <Target Name="_IsProjectRestoreSupported" Returns="@(_ValidProjectsForRestore)">
+    <ItemGroup>
+      <_ValidProjectsForRestore Include="$(MSBuildProjectFullPath)" />
+    </ItemGroup>
+  </Target>
+  <Target Name="Restore" />
 </Project>

installer/PowerToysSetup/PowerToysInstaller.wixproj

@@ -185,4 +185,12 @@ call powershell.exe -NonInteractive -executionpolicy Unrestricted -File $(MSBuil
   <Target Name="BeforeBuild">
     <HeatDirectory Directory="..\..\src\common\FilePreviewCommon\Assets\Monaco\monacoSRC" PreprocessorVariable="var.MonacoSRCHarvestPath" OutputFile="MonacoSRC.wxs" ComponentGroupName="MonacoSRCHeatGenerated" DirectoryRefId="MonacoPreviewHandlerMonacoSRCFolder" AutogenerateGuids="false" GenerateGuidsNow="true" ToolPath="$(WixToolPath)" RunAsSeparateProcess="true" SuppressFragments="false" SuppressRegistry="false" SuppressRootDirectory="true"/>
   </Target>
+
+  <!-- Prevents NU1503 -->
+  <Target Name="_IsProjectRestoreSupported" Returns="@(_ValidProjectsForRestore)">
+    <ItemGroup>
+      <_ValidProjectsForRestore Include="$(MSBuildProjectFullPath)" />
+    </ItemGroup>
+  </Target>
+  <Target Name="Restore" />
 </Project>