[Back port to 11.2] Document variants count as multiple copies of a translation

If you have a translated document with more than one variant (published, unpublished...) then you get a warning

"More than one translated variant found for node " + id + " in language " + language

Whereas you would expect these variants to not be relevant for this case.

Found in class org.hippoecm.repository.translation.HippoTranslatedNode#getTranslation