role: Use FQCN for ansible.builtin

Use Fully Qualified Collection Name (FQCN) for ansible builtins. This is
ansible.builtin.set_fact instead of set_fact for example and aplies for
all actions that are part of ansible.builtin.

All the replaced ansible.builtins:
  assert, command, copy, debug, fail, fetch, file, import_playbook,
  import_tasks, include_role, include_tasks, include_vars, package,
  set_fact, shell, slurp, stat, systemd

tests/role/env_facts.yml

@@ -1,21 +1,21 @@
 ---
 - block:
   - name: Get Domain from server name
-    set_fact:
+    ansible.builtin.set_fact:
       ipaserver_domain: "{{ ansible_facts['fqdn'].split('.')[1:] | join ('.') }}"
     when: "'fqdn' in ansible_facts"
   - name: Set Domain to 'ipa.test' if FQDN could not be retrieved.
-    set_fact:
+    ansible.builtin.set_fact:
       ipaserver_domain: "ipa.test"
     when: "'fqdn' not in ansible_facts"
   when: ipaserver_domain is not defined
 
 - name: Set ipaserver_realm.
-  set_fact:
+  ansible.builtin.set_fact:
     ipaserver_realm: "{{ ipaserver_domain | upper }}"
   when: ipaserver_realm is not defined
 
 - name: Create FQDN for host01
-  set_fact:
+  ansible.builtin.set_fact:
     host1_fqdn: "host01.{{ ipaserver_domain }}"
     host2_fqdn: "host02.{{ ipaserver_domain }}"