Core/AuctionHouse: Fixed field type mismatches when saving auction to database (db fields are unsigned int) and prevent posting auctions with bids or buyouts over gold cap

Closes #9762
Core/Players: Fixed deleting characters unlinked from accounts

Closes #9764
Core/Tickets

* Fixed .ticket complete command not marking tickets as completed
* Fixed "Need more help" button functionality after ticket has been answered by a GM

Closes #9383
Core/GameObjects: SMSG_DESTRUCTIBLE_BUILDING_DAMAGE needs to be sent for destructible building heals as well
Core/Spells

* Removed area MiscValue check for spells with SPELL_EFFECT_BIND, it's purpose is only to be sent in packets, not determine real area player will be bound to.
* Corrected guid sent in SMSG_PLAYERBOUND, it should be caster's guid, not player's
* Also updated position for Teach: Death Gate

Closes #9661
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore