Add `dm` input option to commands that requires it

[franmomu]

Feature Request

Q	A
New Feature	yes
RFC	no
BC Break	no

Summary

Right now it gets the documentManager from a helper:

https://github.com/doctrine/mongodb-odm/blob/3171964251eb42bac7ff0a57af02e720366081d9/lib/Doctrine/ODM/MongoDB/Tools/Console/Command/Schema/AbstractCommand.php#L61-L65

we can add it as an input option and have something similar to AbstractEntityManagerCommand, that way we could use these commands directly from the bundle instead of creating proxy commands.