Implements byond_status() for harddel hunting (#77818)

## About The Pull Request

In addition, improves dump_harddel_deets usage to hopefully hit in unit
testing

byond_status() will dump as a part of find_references(). While I'd like
to expand that if we ever get a proper version, this is good for how we
have things setup rn.

code/modules/admin/view_variables/reference_tracking.dm

@@ -22,6 +22,10 @@
 	if(usr?.client)
 		usr.client.running_find_references = type
 
+#ifdef UNIT_TESTS
+	log_reftracker("Currently sleeping procs [byond_status()]")
+#endif
+
 	log_reftracker("Beginning search for references to a [type].")
 
 	var/starting_time = world.time