host*: 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/hostgroup/test_hostgroup.yml

@@ -6,7 +6,7 @@
 
   tasks:
   - name: Get Domain from server name
-    set_fact:
+    ansible.builtin.set_fact:
       ipaserver_domain: "{{ ansible_facts['fqdn'].split('.')[1:] | join ('.') }}"
     when: ipaserver_domain is not defined
 

tests/hostgroup/test_hostgroup_client_context.yml

@@ -6,7 +6,7 @@
 
   tasks:
   - name: Include FreeIPA facts.
-    include_tasks: ../env_freeipa_facts.yml
+    ansible.builtin.include_tasks: ../env_freeipa_facts.yml
 
   # Test will only be executed if host is not a server.
   - name: Execute with server context in the client.
@@ -27,13 +27,13 @@
 # in upstream CI.
 
 - name: Test hostgroup using client context, in client host.
-  import_playbook: test_hostgroup.yml
+  ansible.builtin.import_playbook: test_hostgroup.yml
   when: groups['ipaclients']
   vars:
     ipa_test_host: ipaclients
 
 - name: Test hostgroup using client context, in server host.
-  import_playbook: test_hostgroup.yml
+  ansible.builtin.import_playbook: test_hostgroup.yml
   when: groups['ipaclients'] is not defined or not groups['ipaclients']
   vars:
     ipa_context: client

tests/hostgroup/test_hostgroup_membermanager.yml

@@ -5,7 +5,7 @@
   gather_facts: false
 
   tasks:
-  - include_tasks: ../env_freeipa_facts.yml
+  - ansible.builtin.include_tasks: ../env_freeipa_facts.yml
 
   - name: Tests requiring IPA version 4.8.4+
     block:

tests/hostgroup/test_hostgroup_rename.yml

@@ -5,7 +5,7 @@
   gather_facts: false
 
   tasks:
-  - include_tasks: ../env_freeipa_facts.yml
+  - ansible.builtin.include_tasks: ../env_freeipa_facts.yml
 
   - name: Tests requiring IPA version 4.8.7+
     block: