refactor: Update check-exists.yml to check by vmid or hostname

roles/proxmox_lxc_provision/tasks/check-exists.yml

@@ -4,12 +4,11 @@
     type: lxc
   register: proxmox_lxcs
 
-- name: Check if LXC with hostname already exists
+- name: Check if LXC already exists
   ansible.builtin.set_fact:
     lxc_exists: >-
       {{
-        proxmox_lxcs.proxmox_vms
-        | selectattr('name', 'equalto', lxc_hostname)
-        | list
-        | length > 0
+        (lxc_vmid is defined and lxc_vmid | int in (proxmox_lxcs.proxmox_vms | map(attribute='vmid') | list))
+        or
+        (lxc_hostname is defined and (proxmox_lxcs.proxmox_vms | selectattr('name', 'equalto', lxc_hostname) | list | length > 0))
       }}