ipabackup 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

roles/ipabackup/tasks/copy_backup_to_server.yml

@@ -1,40 +1,40 @@
 ---
 - name: Fail on invalid ipabackup_name
-  fail: msg="ipabackup_name {{ ipabackup_name }} is not valid"
+  ansible.builtin.fail: msg="ipabackup_name {{ ipabackup_name }} is not valid"
   when: ipabackup_name is not defined or
         ipabackup_name | length < 1 or
         (ipabackup_name.find("ipa-full-") == -1 and
          ipabackup_name.find("ipa-data-") == -1)
 
 - name: Set controller source directory
-  set_fact:
+  ansible.builtin.set_fact:
     ipabackup_controller_dir:
       "{{ ipabackup_controller_path | default(lookup('env','PWD')) }}"
 
 - name: Set ipabackup_item
-  set_fact:
+  ansible.builtin.set_fact:
     ipabackup_item:
       "{{ ipabackup_name | regex_search('.*_(ipa-.+)','\\1') | first }}"
   when: "'_ipa-' in ipabackup_name"
 
 - name: Set ipabackup_item
-  set_fact:
+  ansible.builtin.set_fact:
     ipabackup_item: "{{ ipabackup_name }}"
   when: "'_ipa-' not in ipabackup_name"
 
 - name: Stat backup to copy
-  stat:
+  ansible.builtin.stat:
     path: "{{ ipabackup_controller_dir }}/{{ ipabackup_name }}"
   register: result_backup_stat
   delegate_to: localhost
   become: no
 
 - name: Fail on missing backup to copy
-  fail: msg="Unable to find backup {{ ipabackup_name }}"
+  ansible.builtin.fail: msg="Unable to find backup {{ ipabackup_name }}"
   when: result_backup_stat.stat.isdir is not defined
 
 - name: Copy backup files to server for "{{ ipabackup_item }}"
-  copy:
+  ansible.builtin.copy:
     src: "{{ ipabackup_controller_dir }}/{{ ipabackup_name }}/"
     dest: "{{ ipabackup_dir }}/{{ ipabackup_item }}"
     owner: root