FIX: correctly check for hasData in admin-report (#31197)

Using length is not working on javascript objects and this would always
be falsey.

```
const test = { foo: 1 };
test.length // undefined
```

app/assets/javascripts/admin/addon/components/admin-report.gjs

@@ -156,7 +156,7 @@ export default class AdminReport extends Component {
   }
 
   get hasData() {
-    return this.model?.data?.length > 0;
+    return isPresent(this.model?.data);
   }
 
   get disabledLabel() {