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

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

roles/proxmox/tasks/55_create_vm.yml

@@ -2,7 +2,8 @@
 - name: Create VM
   community.general.proxmox_kvm:
     api_user: "{{ proxmox_api_user }}@pam"
-    api_password: "{{ proxmox_api_password }}"
+    api_token_id: "{{ proxmox_api_token_id }}"
+    api_token_secret: "{{ proxmox_api_token_secret }}"
     api_host: "{{ proxmox_api_host }}"
     agent: true
     name: "{{ vm.name }}"