redirect back to quizzes when trying to directly access a quiz in ember

fixes CNVS-12895

test plan:
  - as a teacher
    - turn on fabulous quizzes
    - create a quiz
    - go to the quiz page and copy the url
    - delete the quiz

  - as a teacher
    - try to directly access the deleted quiz
    - it should redirect you back to the quizzes page with a flash message

  - as a student
    - try to directly access the deleted quiz
    - it should redirect you back to the quizzes page with a flash message
    - try to access the moderate / statistics pages
    - it should redirect you back to the quizzes page with a flash message

  - this also adds a deleted flag to jsonapi quizzes that we can use to
    determine if a quiz was deleted
  - for students this deleted flag shouldn't show up

Change-Id: I3e52aba91517f661f4eac2f9e36fbfef8e951ca6
Reviewed-on: https://gerrit.instructure.com/35383
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Ahmad Amireh <ahmad@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Derek DeVries <ddevries@instructure.com>