Add junit report action (#4218)

Improves #4202 

Example reports: https://github.com/sake92/mill/actions/runs/12563637492

If you click on a failed job on the left, you will see annotations
section on the top.
It shows which tests failed and the reason message.

Author: sake92

.github/workflows/post-build-selective.yml

@@ -72,3 +72,14 @@ jobs:
         if: startsWith(inputs.os, 'windows')
         shell: bash
         continue-on-error: true
+       
+      - name: Publish Test Report
+        uses: mikepenz/action-junit-report@v5
+        if: always() # always run even if the previous step fails
+        with:
+          fail_on_failure: false
+          include_passed: false
+          detailed_summary: true
+          annotate_only: true
+          require_tests: false
+          report_paths: 'out/**/test-report.xml'