add thinkcccore0 to hosts and relevant groups

Especially add it to the proxmox_vm_template_hosts group to ensure
Proxmox VM template generation.

playbooks/deploy_hypervisor.yaml

@@ -1,6 +1,13 @@
 - name: Ensure the VM template generation is set up
   hosts: proxmox_vm_template_hosts
   tasks:
+    - name: Ensure dependencies are present
+      ansible.builtin.apt:
+        name:
+          - git
+          - libguestfs-tools
+      become: true
+
     - name: Ensure /usr/local/{lib,sbin} exist
       ansible.builtin.file:
         path: "{{ item }}"