Scripts/Kelthuzad: move spells into spelldifficulty_dbc and cleanup
Core/Misc: Fix some static analysis issues

Add some asserts and additional NULL checks as sanity checks.
Core/Misc: Fix typo in f47962f6707bb53a3241d23257a5bbd1b2679f87
DB/Gameobjects: Spring clean up for "TEMP" spell focus gameobjects.

* Added missing spell focus gameobjects.
* Old "TEMP" gameobjects now have sniffs values for their radius and the proper entries.
DB/Gameobjects: Bye bye old "TEMP" Gameobjects...
DB/Misc: Fix startup errors after 8ff8f30 and 33be04d
Revert f79a8813a020991f398fc87a9025bf49f610f1e8
Fix trinkets/talents procs on hots taken/done
Merge pull request #11815 from Unholychick/master

Fix trinket/talent procs on hots done/taken
DB/Gameobject: Fix 2 Gameobjects names after 8ff8f30 and 33be04d
DB/Gameobject: Delete another TEMP gameobject
DB/Gameobjects: Added "a few" missing gameobjects
Core/Misc: Fix uninitialized values

Fix Position members not being always initialized.
Valgrind log:
 at : Position::NormalizeOrientation(float) (Object.h:388)
 by : Position::SetOrientation(float) (Object.h:315)
 by : Position::Relocate(Position const&) (Object.h:310)
 by : spell_ulduar_stone_grip::spell_ulduar_stone_grip_AuraScript::OnRemoveVehicle(AuraEffect const*, AuraEffectHandleModes) (boss_kologarn.cpp:592)
DB/SAI: Fix Arcane Disturbances after quest_?_scripts removal

By untaught, closes #5412
DB/Gameobjects: Added spawns on Development Land
DB/Gameobjects: Updated the WDBVerified of the gameobject templates of a4487f8f58d6e19e0499f4a612e66819ae4c9b22 -.-
DB/SAI: Fix few startup errors after 96b3df2
Core/SmartScripts: SMART_ACTION_EQUIP prevent to false errors
Merge pull request #11823 from MitchesD/core_sai

Core/SmartScripts: SMART_ACTION_EQUIP prevent to false errors
DB/Creatures: Added some data for dataless NPCs