Enable runTests for Alpine 3.22 Helix image

Co-authored-by: nagilson <[email protected]>

Author: Copilot

eng/pipelines/templates/jobs/sdk-job-matrix.yml

@@ -59,9 +59,7 @@ parameters:
     osProperties: /p:HostOSName=linux-musl
     # SBOM generation is not supported for alpine.
     enableSbom: false
-    # Skipping all container-based testing for now.
-    # See: https://github.com/dotnet/sdk/issues/40935
-    runTests: false
+    runTests: true
   - categoryName: TemplateEngine
     osProperties: $(linuxOsPortableProperties)
     testProjects: $(Build.SourcesDirectory)/test/Microsoft.TemplateEngine.Cli.UnitTests/Microsoft.TemplateEngine.Cli.UnitTests.csproj;$(Build.SourcesDirectory)/test/dotnet-new.IntegrationTests/dotnet-new.IntegrationTests.csproj