Refactor HelpCommandTests and clean up project file

Moved _projectOutputPath initialization out of the field declaration in HelpCommandTests.cs, likely to be handled in the constructor. Removed obsolete commented-out <RestoreSources> section from coverlet.MTP.validation.tests.csproj for improved clarity.

Author: Bertk

test/coverlet.MTP.validation.tests/HelpCommandTests.cs

@@ -23,7 +23,7 @@ public class HelpCommandTests
   private string[] _testProjectTfms = [];
   private static readonly string s_projectName = "coverlet.MTP.validation.tests";
   private const string SutName = "BasicTestProject";
-  private readonly string _projectOutputPath = TestUtils.GetTestBinaryPath(s_projectName);
+  private readonly string _projectOutputPath;
   private readonly string _testProjectPath;
   private readonly string _repoRoot ;
 

test/coverlet.MTP.validation.tests/coverlet.MTP.validation.tests.csproj

@@ -9,12 +9,10 @@
     <UseMicrosoftTestingPlatformRunner>true</UseMicrosoftTestingPlatformRunner>
     <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
     <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
-    <!--
     <RestoreSources>
       https://api.nuget.org/v3/index.json;
       $(RepoRoot)artifacts/package/$(Configuration.ToLowerInvariant())
     </RestoreSources>
-    -->
     <IsPackable>false</IsPackable>
     <IsTestingPlatformApplication>true</IsTestingPlatformApplication>
     <!-- replace the xUnit.net native command line experience with the Microsoft Testing Platform command line experience -->