[Messenger] Worker state and reset_on_message

[volendavidov]

The documentation states that That's why Symfony automatically resets the service container between two messages.. However it does not explain that the service must implement Symfony\Contracts\Service\ResetInterface or Symfony\Component\Cache\ResettableInterface in order to reset the service leading to the impression that a new instance of the service will be provided automagically. Shouldn't this be elaborated in the documentation?

[javiereguiluz]

Yes, we should mention this. Would you be willing to create a pull request to improve this? Thanks!