matrix: Set IRC user group ID

roles/matrix/templates/appservice-registration-irc.yaml.j2

@@ -7,6 +7,7 @@ namespaces:
 {% for network in vault_matrix_secrets[matrix_server_name].irc_networks.values() %}
     - exclusive: true
       regex: '@{{ network.name | regex_escape() }}_.*:{{ matrix_server_name | regex_escape() }}'
+      group_id: '+{{ network.name }}:{{ matrix_server_name }}'
 {% endfor %}
 
   aliases:

roles/matrix/templates/irc-bridge.yaml.j2

@@ -187,7 +187,7 @@ ircService:
         # This should be set to the same thing as namespaces.users.group_id in irc_registration.
         # This does not alter existing rooms.
         # Leaving this option empty will not set the event.
-        groupId: ""
+        groupId: "+{{ settings.name }}:{{ matrix_server_name }}"
         # Should created Matrix rooms be federated? If false, only users on the
         # HS attached to this AS will be able to interact with this room.
         # Default: true.