Support multiple view modes for a given library

I updated the MR so that it applies to the latest version. Only changed the custom view mode variable to $view_mode as it seemed more logical to me for a contrib module. Otherwise, it’s ready for a final review.

PS: I have also made sure that the issue ✨ Support multiple view modes patch from Entity Print module Needs review is properly aligned with the MR from this issue.

I added the view_mode parameter as an extra suggestion for the naming of the Twig template used.

PS: For some reason, I can't turn the MR to a non-Draft status.

FYI, we've been using the patch/MR here along with the one in ✨ Add option to set theme used for entity_print rendering Needs work , and found managing the two patches at once to be cumbersome. As such, I've created a custom fork that incorporates both, here: https://gitlab.com/consensus.enterprises/drupal/entity_print/-/commits/d...