skip ensuring ntp packages in coreos (#9742)

Check OS when ensuring NTP package and tzdata package.

roles/kubernetes/preinstall/tasks/0081-ntp-configurations.yml

@@ -4,6 +4,9 @@
     name:
       - "{{ ntp_package }}"
     state: present
+  when:
+    - not is_fedora_coreos
+    - not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
 
 - name: Disable systemd-timesyncd
   service:
@@ -71,6 +74,8 @@
     state: present
   when:
     - ntp_timezone
+    - not is_fedora_coreos
+    - not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
 
 - name: Set timezone
   timezone: