Refactor when: mariadb_use_official_repo in a block

tasks/setup_debian.yml

@@ -1,4 +1,7 @@
 ---
+- name: Install mariadb official repository
+  when: mariadb_use_official_repo
+  block:
     - name: Install mariadb repo necessary packages
       ansible.builtin.apt:
         package:
@@ -6,7 +9,6 @@
           - gnupg2
         state: present
         update_cache: true
-  when: mariadb_use_official_repo
 
     - name: Install mariadb repository key
       ansible.builtin.get_url:
@@ -17,7 +19,6 @@
         owner: root
         group: root
         mode: "0644"
-  when: mariadb_use_official_repo
 
     - name: Determine distribution name (Debian sid pb)
       ansible.builtin.set_fact:
@@ -32,7 +33,6 @@
         owner: root
         group: root
         mode: "0644"
-  when: mariadb_use_official_repo
 
     - name: Prefer MariaDB repo over Debian repo
       ansible.builtin.copy:
@@ -45,7 +45,6 @@
         owner: root
         group: root
         mode: "0644"
-  when: mariadb_use_official_repo
 
 - name: Install packages
   ansible.builtin.apt: