disable item analysis for surveys

fixes CNVS-10333

test plan:
- as a teacher
  - create an ungraded survey
  - publish the survey

- as a student
  - take the survey

- as a teacher
  - go to the quiz and click "Survey Statistics"
  - the "Generate Item Analysis" button should be disabled
  - it should show a tooltip that item analysis isn't available for surveys

Change-Id: I45c69d18418cceacbea009f67905e448b71edb74
Reviewed-on: https://gerrit.instructure.com/28957
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Stanley Stuart <stanley@instructure.com>
QA-Review: Myller de Araujo <myller@instructure.com>
Product-Review: Derek DeVries <ddevries@instructure.com>