[sushy_emulator] Replace regex with join filter for VM instance list

- Replace complex Jinja2 for-loop with idiomatic filter chain
  (dict2items | selectattr | map | list)
- Remove regex_replace in favor of list in template
- Keep variable as list for loop/index access in tasks

Co-authored-by: Cursor <cursoragent@cursor.com>
Signed-off-by: Sergii Golovatiuk <sgolovat@redhat.com>

Author: 2 people

roles/sushy_emulator/tasks/collect_details.yml

@@ -97,15 +97,15 @@
     - name: Generate list of filtered VMs
       vars:
         _matching_vms: >-
-          {% set matching_vms = [] -%}
-          {% for host, uuid in cifmw_libvirt_manager_uuids.items() -%}
-          {%   if host | regex_search(cifmw_sushy_emulator_vm_prefix_filter | default('') + '.*') -%}
-          {%     set _ = matching_vms.append(uuid) -%}
-          {%   endif -%}
-          {% endfor -%}
-          {{ matching_vms }}
+          {{
+            cifmw_libvirt_manager_uuids |
+            dict2items |
+            selectattr('key', 'match', cifmw_sushy_emulator_vm_prefix_filter | default('') ~ '.*') |
+            map(attribute='value') |
+            list
+          }}
       ansible.builtin.set_fact:
-        _cifmw_sushy_emulator_instances: "{{ _matching_vms | regex_replace('\n(?!.*\n)', ', ')}}"
+        _cifmw_sushy_emulator_instances: "{{ _matching_vms }}"
       when:
         - _matching_vms | length > 0