Refactor: Migrate deprecated Ansible facts to ansible_facts[] syntax

Why:
- Ansible 2.20+ deprecates INJECT_FACTS_AS_VARS and direct usage of top-level ansible_* facts.
- This change updates all affected roles and vars files to the new supported syntax.
- Ensures compatibility with upcoming Ansible 2.24 removal of implicit fact injection.

Conversation reference:
https://chatgpt.com/share/692f639b-1380-800f-9f18-732f7108e9e2

group_vars/all/18_resource.yml

@@ -1,6 +1,6 @@
 # Host resources
-RESOURCE_HOST_CPUS:  "{{ ansible_processor_vcpus | int }}"
-RESOURCE_HOST_MEM:   "{{ (ansible_memtotal_mb | int) // 1024 }}"
+RESOURCE_HOST_CPUS:  "{{ ansible_facts['processor_vcpus'] | int }}"
+RESOURCE_HOST_MEM:   "{{ (ansible_facts['memtotal_mb'] | int) // 1024 }}"
 
 # Reserve for OS
 RESOURCE_HOST_RESERVE_CPU: 2