Fix zabbix_agent include_dir creation logic (#1366)

roles/zabbix_agent/tasks/Linux.yml

@@ -128,29 +128,16 @@
   tags:
     - config
 
-- name: "Create include dir zabbix-agent"
-  ansible.builtin.file:
-    path: "{{ zabbix_agent_include_dir }}"
-    owner: root
-    group: zabbix
-    mode: "{{ zabbix_agent_include_mode }}"
-    state: directory
-  become: true
-  tags:
-    - config
-  when: zabbix_agent_include_dir is string
-
 - name: "Create include dirs zabbix-agent"
   ansible.builtin.file:
     path: "{{ include_dir }}"
     owner: root
     group: zabbix
     mode: "{{ zabbix_agent_include_mode }}"
     state: directory
-  loop: "{{ zabbix_agent_include_dir | list }}"  # To prevent errors, filter a string value as a list
+  loop: "{{ [zabbix_agent_include_dir] if zabbix_agent_include_dir is string else zabbix_agent_include_dir }}"
   loop_control:
     loop_var: 'include_dir'
-  when: zabbix_agent_include_dir is iterable
   become: true
   tags:
     - config