[SSSD] [sssd PR#753][opened] ci: add Fedora Rawhide

[pbrezina]

   URL: https://github.com/SSSD/sssd/pull/753
Author: pbrezina
 Title: #753: ci: add Fedora Rawhide
Action: opened

PR body:
"""
I created rawhide vagrant boxes and push their configuration to our ci.
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/753/head:pr753
git checkout pr753