Core/Objects: Added missing data convertion for `playercreateinfo_spell_custom`.
Fixed a duplicate ALTER query, it was already in the previous SQL file.
Rename sql files
Core/Vehicles

* Fixed crash happening when passenger died on vehicle he was controlling
* Fixed crash happening if vehicle control aura was removed before passenger is fully added to vehicle

Closes #7160
DB/Quests: Fix The Best of Intentions, closes #5716

Remove a bunch of incorrectly spawned NPCs and add some missing NPCs and GOs for quest Defiling the Defilers.
Script/Spell: Unlocking Zuluhed's Chains

Closes #996
DB/Loot: Correct Lootmode for some questitems (thx redsonja as well)

Closes #9382
Closes #9381
DB/SAI fix some event_flags and other conversion issues

Closes #9144
Core/Vehicles: Fixed a crash introduced in 2c169bcca51ca1b5cdbc73c9a4d402d46cdcfc15
DB/Spells: Fixed startup errors related to playercreateinfo_spell, and prevent logging spam when race mask or class mask 0 is used.
Scripts/Pit of Saron: Very minor spelling error correction.
Merge pull request #9424 from gigatotem/master

Minor spelling correction in Scourgelord Tyrannus.
DB/Spells: Corrected playercreateinfo_spell records *for good*.

Also corrected load count and temporarily removed an error log. It needs better troubleshooting to avoid error'ing false positives.
Allow reply to whispers if you are under CONFIG_CHAT_WHISPER_LEVEL_REQ, and implement feature for GMs to remove single players from their WhisperWhiteList.
Remove documentation for script/custom texts

The related code and tables do not exist anymore.
Fix some engrish
Core/Unit: Fall after exiting vehicle if is in air and can not fly
Script/Quest: Into the wild green Yonder

Still todo:
* Fix spell focus requirement for the drop spell casted by the vehicle

Closes: #8752
Merge pull request #9396 from thomas007788/Whispers

Allow reply to whispers if you are under CONFIG_CHAT_WHISPER_LEVEL_REQ
SQL: Rename SQL file after PR merge