feat(pb,role,task): makes VM deployment playbook use new validation pre_tasks, become_method and os_template tasks are shared now

tasks/become_method_validation.yaml

@@ -0,0 +1,22 @@
+--- 
+
+- name: Set default become method
+  ansible.builtin.set_fact:
+    guest_become_method: "sudo"
+
+- name: Prompt for become method with immediate validation
+  ansible.builtin.pause:
+    prompt: "Choose become method, available: sudo, su, pbrun, pfexec, doas, dzdo, ksu, runas, machinectl [sudo]"
+  register: become_method_result
+  until: >
+    become_method_result.user_input | length == 0 or
+    (
+      become_method_result.user_input in ['sudo', 'su', 'pbrun', 'pfexec', 'doas', 'dzdo', 'ksu', 'runas', 'machinectl'] 
+    )
+  retries: 2
+  delay: 0
+
+- name: Use user input only if provided, otherwise keep the default
+  ansible.builtin.set_fact:
+    guest_become_method: "{{ become_method_result.user_input }}"
+  when: become_method_result.user_input | length > 0