azure tests: move to fedora 39
    
    Update python3 to ensure the fix for BZ 2252567 is pulled.
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>