Core/Scripts: Fixed Vaelastrasz bomb mechanic (#18260)

* Core/Scripts: Fixed Vaelastrasz bomb mechanic

Vaelstraz was suppose to bomb raid members that are mana users every 15
seconds. He was not doing that with the current implementation.

This implementation allows him to bomb the raid and to select the proper
targets. This is also done in a cleaner way.

* Added AuraScript for SPELL_BURNINGADRENALINE

Needed to define an AuraScript for custom behavior that would denatonate
the damaging aura when the debuff falls off.

SpellId - 18173

* Added SQL for Burning Adrenaline Script Ref

* Fixed Multiple Application of BA

* Add unit null check in lambda

* Remove DB name from sql query

* Added Newline in SQL update file.

* Added SQL delete query for potential existing spell

* Fix SQL newline again.

* As suggested a simpler SpellCast overload works

I don't know if there are any consequences but it seems to function fine
in in-game.

I'd like more information on the overload that involves an AuraEffect.

* Remove duplicate Unit null check in lambda

* Update boss_vaelastrasz.cpp

(cherry picked from commit 60ac53ff07)

# Conflicts:
#	src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_vaelastrasz.cpp

sql/updates/world/master/2018_02_11_04_world_2016_11_16_00_world.sql

@@ -0,0 +1,3 @@
+-- Adds a reference to the spell_vael_burning_adrenaline script for Burning Adrenaline (Vael Fight)
+DELETE FROM `spell_script_names` WHERE `ScriptName`='spell_vael_burning_adrenaline';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES ('18173', 'spell_vael_burning_adrenaline');