Use ansible_facts to reference facts

By default, Ansible injects a variable for every fact, prefixed with
ansible_. This can result in a large number of variables for each host,
which at scale can incur a performance penalty. Ansible provides a
configuration option [0] that can be set to False to prevent this
injection of facts. In this case, facts should be referenced via
ansible_facts.<fact>.

This change updates all references to Ansible facts from using
individual fact variables to using the items in the
ansible_facts dictionary. This allows users to disable fact variable
injection in their Ansible configuration, which may provide some
performance improvement.

[0] https://docs.ansible.com/ansible/latest/reference_appendices/config.html#inject-facts-as-vars

molecule/shared/prepare.yml

@@ -5,4 +5,4 @@
       apt:
         update_cache: true
       become: true
-      when: ansible_os_family == "Debian"
+      when: ansible_facts.os_family == "Debian"

tasks/set_facts.yml

@@ -3,10 +3,10 @@
   set_fact:
     chrony_config: /etc/chrony/chrony.conf
     chrony_service: chrony
-  when: ansible_os_family == "Debian"
+  when: ansible_facts.os_family == "Debian"
 
 - name: set_facts | Define RedHat Facts
   set_fact:
     chrony_config: /etc/chrony.conf
     chrony_service: chronyd
-  when: ansible_os_family == "RedHat"
+  when: ansible_facts.os_family == "RedHat"