server: 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/server/test_server.yml

@@ -9,21 +9,21 @@
   # CLEANUP TEST ITEMS
   - block:
       - name: Get server name from hostname
-        set_fact:
+        ansible.builtin.set_fact:
           ipa_server_name: "{{ ansible_facts['fqdn'].split('.')[0] }}"
     rescue:
       - name: Fallback to 'ipaserver'
-        set_fact:
+        ansible.builtin.set_fact:
           ipa_server_name: ipaserver
     when: ipa_server_name is not defined
 
   - block:
       - name: Get domain name from hostname.
-        set_fact:
+        ansible.builtin.set_fact:
           ipaserver_domain: "{{ ansible_facts['fqdn'].split('.')[1:] | join('.') }}"
     rescue:
       - name: Fallback to 'ipa.test'
-        set_fact:
+        ansible.builtin.set_fact:
           ipaserver_domain: "ipa.test"
     when: ipaserver_domain is not defined