ember/template-no-let-reference

Is it ok to disable this rule in tests? This is a contrived test case

```js
let someThing;

hooks.beforeEach(function (assert) {
someThing = null;
});

test('foo', async function (assert) {
someThing = 'foo'

await render(

);
});

test('bar', async function (assert) {
someThing = 'bar'

await render(

);
});
```