[Commands] Cleanup #reloadaa Command. (#2120)

* [Commands] Cleanup #reloadaa Command.
- Cleanup messages.
- Remove unncessary file_exists command from file.
- Make reloading of Alternate Advancement data global instead of zone specific.

* Update worldserver.cpp

* Update worldserver.cpp

zone/entity.cpp

@@ -5601,7 +5601,7 @@ void EntityList::StopMobAI()
 }
 
 void EntityList::SendAlternateAdvancementStats() {
-	for(auto &c : client_list) {
+	for (auto &c : client_list) {
 		c.second->SendClearPlayerAA();
 		c.second->SendAlternateAdvancementTable();
 		c.second->SendAlternateAdvancementStats();