don't set forwarded to legal job as resolvable_in_reviewer_tools

[eviljeff]

Fixes: mozilla/addons#15255 and fixes mozilla/addons#15259

Description

Sets resolvable_in_reviewer_tools to False for jobs (re)created when a job/add-on is forwarded to legal in Cinder.

Context

When resolvable_in_reviewer_tools is True we ignore the actions (15255) and also don't clear the NHRs (15259).

Testing

• forward a job from the reviewer tools and see that the NHR that lead to the add-on being in the review queue is cleared
  • the edge case here is a job that was itself forwarded from Cinder - that should also lose it's NHR
• check the new CinderJob (use django shell to find it) is resolvable_in_reviewer_tools=False

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.