[ResourceBundle] Resource choice form type

| Q             | A
| ------------- | ---
| Bug fix?      | [no]
| New feature?  | [yes]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | [ #1384 ]
| License       | MIT
| Doc PR        | []

I use this form type in my project. But it can be usefull here too. But this form type is container aware, is there other way to get class names by resource name?
I prefer put this logic in a protected method and use it in the constructor. Something like $this->parent = $this->getDriver($driver). It can be useful if you have custom form type, you can override it easily.