fix: use immutable list operations in Jinja2 template

Ansible doesn't allow .append() on lists in Jinja2 templates.
Changed to use select() filter with regex match instead of loop with append.
This is the same filtering logic but using immutable operations.

deployment/ansible/playbooks/deploy-image.yml

@@ -248,12 +248,7 @@
       ansible.builtin.set_fact:
         registries_to_login: >-
           {%- set found_registries = actual_registry_urls_full.stdout | trim | split('\n') | select('match', '.+') | list -%}
-          {%- set filtered_registries = [] -%}
+          {%- set filtered_registries = found_registries | select('match', '.*\.(de|com|org|net|io|dev).*|.*:[0-9]+.*|^localhost$') | list -%}
-          {%- for reg in found_registries -%}
-            {%- if reg | regex_search('\.(de|com|org|net|io|dev)') or reg | regex_search(':[0-9]+') or reg == 'localhost' -%}
-              {%- set _ = filtered_registries.append(reg) -%}
-            {%- endif -%}
-          {%- endfor -%}
           {%- set default_registry = [docker_registry] -%}
           {%- if filtered_registries | length > 0 -%}
             {{ filtered_registries | unique | list }}