Core/Player: Fix an issue with Player::RemoveRewardedQuest not deleting the queststatus_rewarded form database

Needed for SPELL_EFFECT_CLEAR_QUEST
Merge pull request #12810 from Carbenium/questreward

Core/Player: Fix an issue with Player::RemoveRewardedQuest not deleting ...
Core/Trade: Fixed putting soulbound items to "will not be traded" slot