Expose the re-enabled versions for an appeal

[eviljeff]

Fixes: mozilla/addons#15654

Description

Exposes the versions that were restored as part of an appeal on a disable or reject action.

Context

Testing

• define your cinder api key/secret and turn on the cinder/dsa related waffle switches
• reject a version of an add-on via reviewer tools (makes it easier if you're one the authors)
• in fakemail find the rejection email and go to the appeal link, and submit the appeal
• in reviewer tools accept that appeal by un-rejecting the version
• in fakemail see the email now mentions the version that was rejected, and is now re-enabled

repeat for a force disable

• accepting the appeal is a force enable

Checklist

• Add #ISSUENUM at the top of your PR to an existing open issue in the mozilla/addons repository.
• Successfully verified the change locally.
• The change is covered by automated tests, or otherwise indicated why doing so is unnecessary/impossible.
• Add before and after screenshots (Only for changes that impact the UI).
• Add or update relevant docs reflecting the changes made.