[Cloud SIG] Use util-linux instead of util-linux-ng
Although util-linux rpm in CentOS8 Provides util-linux-ng but it
fails with:
No match for group package "util-linux-ng".
Some package like SecretStorage fails to build due to missing util-linux
with:-
/usr/bin/xvfb-run: line 105: getopt: command not found
Changing buildroot default for CloudSIG to rely on util-linux
instead of util-linux-ng.