[ipsilon_stg] Change the group that has access to sysadmin-noc
    
    We are currently not able to create a new group in ipa on staging. But to gain
    access to @luhliarik to test https://pagure.io/fedora-infrastructure/issue/12092
    let's use some existing group.
    
    Signed-off-by: Michal Konecny <mkonecny@redhat.com>