Description of problem:
In 6.11 it is possible to create or update an OS with a negative number used for major version using API, CLI or UI. It used to be forbidden since BZ#1120199.


Version-Release number of selected component (if applicable):
6.11.0 snap 26


How reproducible:
always


Steps to Reproduce:
1. Create or update an OS using API, CLI or UI and provide a negative number for the major version.


Actual results:
Operating system created (or updated) successfully.
[root@satellite ~]# hammer os info --id 2
Id:                 2
Title:              NegativeOS -99
Release name:       
Family:             
Name:               NegativeOS
Major version:      -99
Minor version:      


Expected results:
It should be banned to create negative OSes like it was in previous Satellite versions.