Use qunit-console-grouper for debugging

Author: NullVoxPopuli

test-app/package.json

@@ -70,6 +70,7 @@
     "pretender": "^3.4.7",
     "prettier": "^2.8.7",
     "qunit": "^2.21.1",
+    "qunit-console-grouper": "^0.3.0",
     "qunit-dom": "^3.2.0",
     "tracked-built-ins": "^3.1.1",
     "webpack": "^5.78.0"