Define separate job to collect test results from all environments.

.github/workflows/unit_tests.yml

@@ -48,9 +48,28 @@ jobs:
         nuget install NUnit.Runners -Version 3.12.0 -OutputDirectory nunit
         nunit/NUnit.ConsoleRunner.3.12.0/tools/nunit3-console.exe Duplicati/UnitTest/bin/Release/Duplicati.UnitTest.dll --where:cat==Utility --result="TestResults/test_results_${{ matrix.os }}.xml"
 
+    - name: Upload Unit Test Results
+      if: always()
+      uses: actions/upload-artifact@v2
+      with:
+        name: Unit Test Results
+        path: TestResults
+
+  report-test-results:
+    name: Report Unit Test Results
+    needs: test
+    runs-on: ubuntu-latest
+    if: always()
+
+    steps:
+    - name: Download Artifacts
+      uses: actions/download-artifact@v2
+      with:
+        name: Unit Test Results
+        path: TestResults
+
     - name: Report Unit Test Results
       uses: MirrorNG/nunit-reporter@v1.0.11
-      if: always()
       with:
         path: TestResults/**/*.xml
         reportTitle: Unit Test Results