Upgrade test execution to MTP

Author: MichaelGrafnetter

.github/copilot-instructions.md

@@ -113,10 +113,10 @@ msbuild.exe DSInternals.slnx -target:Build -property:Configuration=Release -prop
 cd Src
 
 # Run all unit tests
-dotnet test DSInternals.DotNetSdk.slnf
+dotnet test --solution DSInternals.DotNetSdk.slnf
 
 # Run tests for a specific project
-dotnet test DSInternals.Common.Test
+dotnet test --project DSInternals.Common.Test
 ```
 
 ### Running PowerShell Smoke Tests

.github/workflows/autobuild.yml

@@ -73,7 +73,7 @@ jobs:
     - name: Run Unit Tests
       working-directory: Src
       run: |
-        dotnet test DSInternals.TestsOnly.slnf --configuration Debug --no-build -- --report-trx --results-directory "${{ github.workspace }}/TestResults"
+        dotnet test --solution DSInternals.TestsOnly.slnf --configuration Debug --no-build -- --report-trx --results-directory "${{ github.workspace }}/TestResults"
 
     - name: Run PowerShell Desktop Tests
       working-directory: Scripts