[FIX] survey: allow survey user to test a survey

- When tyring to test a survey as a "Survey User" you are redirected to the
  homepage.
  This is due to a faulty access rights check that only allows "Survey
  Managers" to test them.

closes odoo/odoo#33132

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>