Added job e2e-success (#568)

Author: chatton

.github/workflows/e2e.yml

@@ -207,3 +207,12 @@ jobs:
         with:
           name: "${{ matrix.test-name }}-${{ matrix.distro }}-diagnostics"
           path: "${{ github.workspace }}/diagnostics"
+
+  e2e-success:
+    if: always()
+    needs: [tests]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check E2E Result
+        if: needs.tests.result != 'success'
+        run: exit 1