[DX] Potential missing annotation route import

Register controller route when a bundle is generated in xml, yml and php, but we want to generate a crud with annotation
There could be a third case that looks like this:

```yml
acme_blog:
    resource: "@AcmeBlogBundle/Controller/OtherController.php"
    type:     annotation
```

And in this case, since our `PostController.php` is not being imported, it would be added to `routing.yml`.