fix(runtime): migrate roles to nested system fields

roles/configuration/tasks/network.yml

@@ -101,15 +101,7 @@
 - name: Configure Alpine networking
   when: os | lower == "alpine"
   vars:
-    configuration_dns_value: "{{ system_cfg.dns_servers if system_cfg.dns_servers is defined else '' }}"
-    configuration_dns_list_raw: >-
-      {{
-        configuration_dns_value
-        if configuration_dns_value is iterable and configuration_dns_value is not string
-        else configuration_dns_value.split(',')
-      }}
-    configuration_dns_list: >-
-      {{ configuration_dns_list_raw | map('trim') | reject('equalto', '') | list }}
+    configuration_dns_list: "{{ system_cfg.dns.servers | default([]) }}"
     configuration_alpine_static: >-
       {{
         system_cfg.ip is defined
@@ -148,15 +140,7 @@
 - name: Configure Void networking
   when: os | lower == "void"
   vars:
-    configuration_dns_value: "{{ system_cfg.dns_servers if system_cfg.dns_servers is defined else '' }}"
-    configuration_dns_list_raw: >-
-      {{
-        configuration_dns_value
-        if configuration_dns_value is iterable and configuration_dns_value is not string
-        else configuration_dns_value.split(',')
-      }}
-    configuration_dns_list: >-
-      {{ configuration_dns_list_raw | map('trim') | reject('equalto', '') | list }}
+    configuration_dns_list: "{{ system_cfg.dns.servers | default([]) }}"
     configuration_void_static: >-
       {{
         system_cfg.ip is defined