v4 breaks on ember-source 4.4

ember-qunit 8.0.2
ember-source 4.4
@ember/test-helpers 5.1.0
ember-auto-import 2.10.0

failure can be seen here: https://github.com/emberjs/data/pull/9814

upgrade is from 3.1 => 4.1

both 3.28 and 4.4 fail, 3.28 is I think expected.

```
1. 0ms #?? Global error: Uncaught TypeError: _ember_test_adapter__WEBPACK_IMPORTED_MODULE_0___default(...).extend is not a function at webpack://__ember_auto_import__/../../node_modules/.pnpm/ember-q_11774d8fc95bb8513207a040e4dcbf0d/node_modules/ember-qunit/dist/adapter.js?, line 10

2. 0ms #?? Global error: Uncaught Error: The tests file was not loaded. Make sure your tests index.html includes "assets/tests.js". at http://localhost:39479/267563525182/tests/index.html?hidepassed&loadBalance&browser=4, line 95
```