Don't install products on openSUSE client OSes

openSUSE repos often contain multiple "product packages", that conflict.
The idea is that installer installs the correct product once and that's
it. In Uyuni, we currently install all products we can find. That does
not work because of the conflict.

susemanager-utils/susemanager-sls/salt/channels/init.sls

@@ -145,7 +145,7 @@ install_gnupg_debian:
 {%- endif %}
 
 {%- if not salt['pillar.get']('susemanager:distupgrade:dryrun', False) %}
-{%- if grains['os_family'] == 'Suse' and grains['osmajorrelease']|int > 11 and not grains['oscodename'] == 'openSUSE Leap 15.3' %}
+{%- if grains['os_family'] == 'Suse' and grains['osmajorrelease']|int > 11 and "opensuse" not in grains['oscodename']|lower %}
 mgrchannels_install_products:
   product.all_installed:
     - require: