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/up2date_debian/defaults/main.yml

@@ -1,2 +0,0 @@
-extra_pkgs: ""
-extra_pkgs_bpo: ""

roles/up2date_debian/tasks/main.yml

@@ -16,6 +16,8 @@
     - name: Looks like dpkg was interrupted, configure manually
       ansible.builtin.command:
         cmd: dpkg --configure -a
+      register: dpkg_configure_result
+      changed_when: dpkg_configure_result.rc != 0
     - name: Try again to upgrade packages
       ansible.builtin.apt:
         upgrade: dist
@@ -25,26 +27,3 @@
 - name: Install etckeeper
   ansible.builtin.apt:
     name: etckeeper
-    state: latest # noqa package-latest
-
-- name: Install extra packages from stable
-  ansible.builtin.apt:
-    name: "{{ extra_pkgs }}"
-    state: latest # noqa package-latest
-  when: extra_pkgs|length
-
-- name: Add backports for {{ ansible_distribution_release }}
-  ansible.builtin.apt_repository:
-    repo: >
-      deb http://deb.debian.org/debian/ {{ ansible_distribution_release }}-backports
-      main non-free-firmware
-    state: present
-    update_cache: true
-  when: extra_pkgs_bpo|length
-
-- name: Install extra packages from backports
-  ansible.builtin.apt:
-    name: "{{ extra_pkgs_bpo }}"
-    state: latest # noqa package-latest
-    default_release: "{{ ansible_distribution_release }}-backports"
-  when: extra_pkgs_bpo|length