Use Platform.MSBuild to setup nativeAot example (#2645)

Author: nohwnd

samples/mstest-runner/NativeAotRunner/TestProject1/Program.cs

@@ -10,7 +10,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <!-- From preview feed. -->
     <!-- 
       Experimental MSTest Engine & source generator, 
       close sourced, licensed the same as our extensions 
@@ -21,8 +20,9 @@
 
     <PackageReference Include="Microsoft.CodeCoverage.MSBuild" Version="17.10.4" />
     <PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="17.10.4" />
-    
+
     <PackageReference Include="Microsoft.Testing.Extensions.TrxReport" Version="1.0.2" />
+    <PackageReference Include="Microsoft.Testing.Platform.MSBuild" Version="1.0.2" />
     <PackageReference Include="MSTest.TestFramework" Version="3.2.2" />
     <PackageReference Include="MSTest.Analyzers" Version="3.2.2" />