[skip ci] Set logging domain to ?RMQLOG_DOMAIN_GLOBAL on startup

`?RMQLOG_DOMAIN_GLOBAL` used to be added by a now deleted logging
module rabbit_log.

Author: mkuratczyk

deps/rabbit/src/rabbit_prelaunch_logging.erl

@@ -501,6 +501,8 @@ clear_config_run_number() ->
 -spec configure_logger(rabbit_env:context()) -> ok.
 
 configure_logger(Context) ->
+    logger:set_primary_config(metadata, #{domain => ?RMQLOG_DOMAIN_GLOBAL}),
+
     %% Configure main handlers.
     %% We distinguish them by their type and possibly other
     %% parameters (file name, syslog settings, etc.).