refactor(bootstrap): restructure package lists to self-contained per-OS dicts with base/extra/conditional

roles/bootstrap/tasks/alpine.yml

@@ -1,21 +1,25 @@
 ---
 - name: Bootstrap Alpine Linux
   vars:
-    bootstrap_alpine_packages: >-
+    _config: "{{ lookup('vars', bootstrap_var_key) }}"
+    _base_packages: "{{ _config.base | join(' ') }}"
+    _extra_packages: >-
       {{
-        lookup('vars', bootstrap_var_key) | reject('equalto', '') | join(' ')
+        ((_config.extra | default([])) + (_config.conditional | default([])))
+        | reject('equalto', '')
+        | join(' ')
       }}
   block:
-    - name: Install Alpine Linux packages
+    - name: Install Alpine Linux base
       ansible.builtin.command: >
-        apk --root /mnt --no-cache add alpine-base
+        apk --root /mnt --no-cache add {{ _base_packages }}
       register: bootstrap_alpine_bootstrap_result
       changed_when: bootstrap_alpine_bootstrap_result.rc == 0
 
     - name: Install extra packages
-      when: bootstrap_alpine_packages | length > 0
+      when: _extra_packages | trim | length > 0
       ansible.builtin.command: >
-        apk --root /mnt add {{ bootstrap_alpine_packages }}
+        apk --root /mnt add {{ _extra_packages }}
       register: bootstrap_alpine_extra_result
       changed_when: bootstrap_alpine_extra_result.rc == 0