disable take quiz / speed grader menu items in ember if they're not available

fixes CNVS-13258, CNVS-13300

test plan:
  - enable fabulous quizzes
  - as a teacher
    - create an unpublished quiz with only a single attempt allowed
    - go to the ember quiz page
    - the speedgrader link in the menu should be greyed out, and will give you
      a warning if you attempt to go there
    - the "take the quiz" menu item should be greyed out, and will warn you if
      you attempt to take it.
    - publish the quiz
    - the "take the quiz" menu item should now be enabled
    - take the quiz using this menu item
    - attempt to retake the quiz
    - now (since we're limited to 1 attempt) it should be disabled again

Change-Id: I634b0727fccee377c08a390e5507c71c9b9cdd25
Reviewed-on: https://gerrit.instructure.com/35687
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jason Madsen <jmadsen@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Derek DeVries <ddevries@instructure.com>