[Tasks] Schema simplification (#2449)

* Combine task_activity item and npc fields

This will make tooling easier.

While denormalizing goallists may not be ideal, it decouples tasks from
rewards which share the table and removes a redundant column in favor
of a using the delimited string which better matches live packet data.

* [Tasks] Deprecate goallists table, migrate reward goal lists, simplify logic

* Update 2022_09_25_task_concat_matchlists.sql

* Update 2022_09_25_task_concat_matchlists.sql

* Tweaks

* Fix reward column name in conversion script

* Task reward stacking

* Update task_client_state.cpp

* Implement stack counts

* Fix reward item instance memory leak

* Validate reward item instance

* Fix item reward message

* Fix findtask

Co-authored-by: Akkadius <akkadius1@gmail.com>

zone/worldserver.cpp

@@ -3465,12 +3465,6 @@ void WorldServer::HandleReloadTasks(ServerPacket *pack)
 
 			break;
 		}
-		case RELOADTASKGOALLISTS:
-		{
-			LogTasks("Global reload of all Task Goal Lists");
-			task_manager->ReloadGoalLists();
-			break;
-		}
 		case RELOADTASKSETS:
 		{
 			LogTasks("Global reload of all Task Sets");