Core/Quests: Abandon&Finish quest items

Destroy quest items on quest failure/abandon.

Failing/abandoning a quest should not unconditionally remove required items, non-quest specific items such as crafting reagents should remain in inventory.

Delete all quest bound items on quest reward, failure or abandoning.

Only delete all quest bound items from inventory on turn in if the quest is not repeatable

src/server/game/Handlers/QuestHandler.cpp

@@ -418,6 +418,7 @@ void WorldSession::HandleQuestLogRemoveQuest(WorldPacket& recvData)
             }
 
             _player->TakeQuestSourceItem(questId, true); // remove quest src item from player
+            _player->AbandonQuest(questId); // remove all quest items player received before abandoning quest.
             _player->RemoveActiveQuest(questId);
             _player->RemoveTimedAchievement(ACHIEVEMENT_TIMED_TYPE_QUEST, questId);
 #ifdef ELUNA