[Zone] Zone State Improvements Part 3 (#4773)

* [Zone State] Additional improvements

* Return early

* Update zone_save_state.cpp

* Push

* Push

* Update zone.cpp

* Update zone_save_state.cpp

* Equip items that were dynamically added on restore

* IsZoneStateValid helper

* ZoneStateSpawnsRepository::PurgeInvalidZoneStates

* Add Zone:StateSaveClearDays and PurgeOldZoneStates

* spawn2 / unique_spawn block when restored from zone state

* One time purge

* Update zone_state_spawns_repository.h

* Update npc.cpp

* Update npc.cpp

* test

* ORDER BY spawn2_id

* Stuff

* Restored corpses shouldn't trigger events

* Fix weird edge case

zone/spawn2.cpp

@@ -277,6 +277,9 @@ bool Spawn2::Process() {
 
 		npcthis = npc;
 
+		npc->SetResumedFromZoneSuspend(m_resumed_from_zone_suspend);
+		m_resumed_from_zone_suspend = false;
+
 		npc->AddLootTable();
 		if (npc->DropsGlobalLoot()) {
 			npc->CheckGlobalLootTables();