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/backup.yml

@@ -2,7 +2,7 @@
 # tasks file for ipabackup
 
 - name: Create backup
-  shell: >
+  ansible.builtin.shell: >
     ipa-backup
     {{ "--gpg" if ipabackup_gpg | bool else "" }}
     {{ "--gpg-keyring="+ipabackup_gpg_keyring if ipabackup_gpg_keyring is defined else "" }}
@@ -15,7 +15,7 @@
 
 - block:
   - name: Get ipabackup_item from stderr or stdout output
-    set_fact:
+    ansible.builtin.set_fact:
       ipabackup_item: "{{ item | regex_search('\n.*/([^\n]+)','\\1') | first }}"
     when: item.find("Backed up to "+ipabackup_dir+"/") > 0
     with_items:
@@ -25,15 +25,15 @@
       label: ""
 
   - name: Fail on missing ipabackup_item
-    fail: msg="Failed to get ipabackup_item"
+    ansible.builtin.fail: msg="Failed to get ipabackup_item"
     when: ipabackup_item is not defined
 
   - name: Copy backup to controller
-    include_tasks: "{{ role_path }}/tasks/copy_backup_from_server.yml"
+    ansible.builtin.include_tasks: "{{ role_path }}/tasks/copy_backup_from_server.yml"
     when: state|default("present") == "present"
 
   - name: Remove backup on server
-    include_tasks: "{{ role_path }}/tasks/remove_backup_from_server.yml"
+    ansible.builtin.include_tasks: "{{ role_path }}/tasks/remove_backup_from_server.yml"
     when: not ipabackup_keep_on_server
 
   when: ipabackup_to_controller