[CI][Turbo] Fix direct deprecation notice

```
Not enabling lazy ghost objects is deprecated and will not be supported in Doctrine ORM 3.0. Ensure Doctrine\ORM\Configuration::setLazyGhostObjectEnabled(true) is called to enable them.
```

Author: smnandre

src/Turbo/tests/app/Kernel.php

@@ -90,6 +90,7 @@ protected function configureContainer(ContainerConfigurator $container): void
                         'alias' => 'App',
                     ],
                 ],
+                'enable_lazy_ghost_objects' => true,
             ],
         ];