mysql: remove py2 package install for bullseye

mysql/tasks/main.yml

@@ -5,12 +5,19 @@
   apt:
     name:
       - mariadb-server
-      - python-mysqldb
+      - python3-mysqldb
     state: present
   tags:
     - packages
     - mysql
 
+- name: ensure legacy mysql packages are installed
+  apt:
+    name:
+      - python-mysqldb
+    state: present
+  when: ansible_distribution_major_version|int(default=99) < 11
+
 - name: ensure mysql is started
   service:
     name: mysql