Fixes #37581 - Refactor timezone and NTP server config in kickstart

Add conditional logic to use 'timesource' command,
maintaining compatibility with older versions.

app/views/unattended/provisioning_templates/provision/kickstart_default.erb

@@ -142,7 +142,14 @@ authselect --useshadow --passalgo=<%= @host.operatingsystem.password_hash.downca
 <% else -%>
 authconfig --useshadow --passalgo=<%= @host.operatingsystem.password_hash.downcase || 'sha256' %> --kickstart
 <% end -%>
+<% if rhel_compatible && os_major < 9 -%>
 timezone --utc <%= host_param('time-zone') || 'UTC' %> <%= host_param('ntp-server') ? "--ntpservers #{host_param('ntp-server')}" : '' %>
+<% else -%>
+timezone --utc <%= host_param('time-zone') || 'UTC' %>
+<% if host_param('ntp-server') -%>
+timesource --ntp-server <%= host_param('ntp-server') %>
+<% end -%>
+<% end -%>
 
 <% if rhel_compatible -%>
 services --disabled gpm,sendmail,cups,pcmcia,isdn,rawdevices,hpoj,bluetooth,openibd,avahi-daemon,avahi-dnsconfd,hidd,hplip,pcscd

test/unit/foreman/renderer/snapshots/ProvisioningTemplate/provision/Kickstart_default.rhel9_dhcp.snap.txt

@@ -16,7 +16,7 @@ network --device=00-f0-54-1a-7e-e0 --hostname snapshot-ipv4-dhcp-rhel9 --noipv6
 rootpw --iscrypted $1$rtd8Ub7R$5Ohzuy8WXlkaK9cA2T1wb0
 firewall --service=ssh
 authselect --useshadow --passalgo=sha512 --kickstart
-timezone --utc UTC 
+timezone --utc UTC
 
 services --disabled gpm,sendmail,cups,pcmcia,isdn,rawdevices,hpoj,bluetooth,openibd,avahi-daemon,avahi-dnsconfd,hidd,hplip,pcscd
 

test/unit/foreman/renderer/snapshots/ProvisioningTemplate/provision/Kickstart_default.rocky9_dhcp.snap.txt

@@ -16,7 +16,7 @@ network --device=00-f0-54-1a-7e-e0 --hostname snapshot-ipv4-dhcp-rocky9 --noipv6
 rootpw --iscrypted $1$rtd8Ub7R$5Ohzuy8WXlkaK9cA2T1wb0
 firewall --service=ssh
 authselect --useshadow --passalgo=sha512 --kickstart
-timezone --utc UTC 
+timezone --utc UTC
 
 services --disabled gpm,sendmail,cups,pcmcia,isdn,rawdevices,hpoj,bluetooth,openibd,avahi-daemon,avahi-dnsconfd,hidd,hplip,pcscd