Enable container test execution

Author: Jason Zhai

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

@@ -32,9 +32,7 @@ parameters:
     container: ubuntu2204DebPkg
     helixTargetContainer: $(helixTargetContainerPrefix)ubuntu-22.04-helix-amd64
     osProperties: $(linuxOsPortableProperties)
-    # Skipping all container-based testing for now.
-    # See: https://github.com/dotnet/sdk/issues/40935
-    runTests: false
+    runTests: true
   - categoryName: ContainerBased
     container: fedora39
     # No fedora Helix container is available, so use the ubuntu one instead.