Add builtin role pg_signal_autovacuum_worker

which was introduced in PostgreSQL-18

Author: larskanis

lib/pg_ldap_sync/application.rb

@@ -167,7 +167,7 @@ def search_ldap_groups
     PgRole = Struct.new :name, :member_names
 
     # List of default roles taken from https://www.postgresql.org/docs/current/predefined-roles.html
-    PG_BUILTIN_ROLES = %w[pg_read_all_data pg_write_all_data pg_read_all_settings pg_read_all_stats pg_stat_scan_tables pg_monitor pg_database_owner pg_signal_backend pg_read_server_files pg_write_server_files pg_execute_server_program pg_checkpoint pg_create_subscription pg_maintain pg_use_reserved_connections]
+    PG_BUILTIN_ROLES = %w[pg_read_all_data pg_write_all_data pg_read_all_settings pg_read_all_stats pg_stat_scan_tables pg_monitor pg_database_owner pg_signal_backend pg_read_server_files pg_write_server_files pg_execute_server_program pg_checkpoint pg_create_subscription pg_maintain pg_use_reserved_connections pg_signal_autovacuum_worker]
 
     def search_pg_users
       pg_users_conf = @config[:pg_users]