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

playbooks/host/ensure_host_with_randompassword.yml

@@ -14,5 +14,5 @@
     register: ipahost
 
   - name: Print generated random password
-    debug:
+    ansible.builtin.debug:
       var: ipahost.host.randompassword

playbooks/host/host-present-with-randompassword.yml

@@ -13,5 +13,5 @@
     register: ipahost
 
   - name: Print generated random password
-    debug:
+    ansible.builtin.debug:
       var: ipahost.host.randompassword

playbooks/host/hosts-present-with-randompasswords.yml

@@ -17,9 +17,9 @@
     register: ipahost
 
   - name: Print generated random password for host01.example.com
-    debug:
+    ansible.builtin.debug:
       var: ipahost.host["host01.example.com"].randompassword
 
   - name: Print generated random password for host02.example.com
-    debug:
+    ansible.builtin.debug:
       var: ipahost.host["host02.example.com"].randompassword