DB/SAI: Fix Highlord Demitrian

By Raszagal closes #11436
DB/SAI: The Power of the Elements

By dr-j and untaught, closes #6479
DB/SAI: Blast the Infernals!

By dr-j, closes #11428
Core/Spells: move some spells so spellscripts
DB/SAI: Fix freed from the Hive

By dr-j, closes #11438
Merge branch 'master' of github.com:TrinityCore/TrinityCore
DB/SAI:Emergency Protocol: Section 8.2, Paragraph D

By dr-j, closes #11206
DB/SAI: The Earthen Oath

By dr-j closes #6966
Core/Spells: move more spells to spellscripts
Core: Fix warnings
Core/Spells: Fix typo in 955fb907c549fea0088f8c105714cc9fb931da15
Core/Spells: Add SPELL_ATTR0_CU_REQ_CASTER_BEHIND_TARGET to some Backstab spells

Original fix by Bruescrues

Closes #10767

Signed-off-by: Duarte Duarte <dnpd.dd@gmail.com>
Tools/VMAP: Fix a logic error in processArgv of vmapexport
Core/Spell: Fix logic fail in 96ae4caf6258882cf89ff6d4bb3ac5aa0a3474f7