refactor(ansible): centralize inventory and variables in 'vars' directory

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/common/tasks/time.yml

@@ -1,11 +1,11 @@
 ---
-- name: Set timezone to "{{ timezone }}"
+- name: Set timezone
   community.general.timezone:
     name: "{{ timezone }}"
   become: true
   when: ansible_user_id != "root"
 
-- name: Set timezone to "{{ timezone }}"
+- name: Set timezone
   community.general.timezone:
     name: "{{ timezone }}"
   when: ansible_user_id == "root"