Refactor Ansible tasks to use fully qualified module names and improve code consistency

- Updated all tasks to use fully qualified module names (e.g., ansible.builtin.shell, ansible.builtin.copy) for clarity and to avoid ambiguity.
- Replaced deprecated 'yum' module with 'dnf' for package management on RedHat-based systems.
- Improved formatting and consistency in task definitions, including the use of double quotes for strings and consistent indentation.
- Removed unnecessary comments and whitespace to enhance readability.
- Ensured that conditions and loops are consistently formatted across all tasks.

roles/common/tasks/x2go-server.yml

@@ -1,11 +1,10 @@
 ---
-
 # ---
 # NFS Server
 # ---
 
 - name: (x2g-server.yml) Ensure X2Go server packages are installed.
-  apt:
+  ansible.builtin.apt:
     name:
       - x2goserver
       - x2goserver-xsession
@@ -17,6 +16,3 @@
     - "groups['x2go_server']|string is search(inventory_hostname)"
   tags:
     - x2g--server
-
-
-