Move extrapackage installation into separate role and make it more flexible

- Introduce `extra_pkgs1` - `extra_pkgs10`
- Introduce `extra_pkgs_bpo1` - `extra_pkgs_bpo10`
- Move package-list from lmn_teacherlaptop into inventory as extra_pkgs1

roles/lmn_teacherlaptop/tasks/main.yml

@@ -1,13 +1,4 @@
 ---
-- name: Install additional teacherlaptop packages
-  ansible.builtin.apt:
-    name:
-      - plasma-discover
-      - nextcloud-desktop
-      - dolphin-nextcloud
-        # - krb5-auth-dialog
-    state: latest # noqa package-latest
-
 - name: Copy polkit rule to allow install packages by role-teacher
   ansible.builtin.copy:
     src: "{{ item }}"