Core/Spells: Adding SpellTargetObjectTypes to spell target checker to early-eliminate alive units

Port From (https://github.com/TrinityCore/TrinityCore/commit/0cae71eac58bf37c6a2cbce2a60dd2aa1f7b4314)

sql/updates/world/master/2021_02_05_00_world_remove_pet_carrion.sql

@@ -0,0 +1 @@
+DELETE FROM spell_script_names WHERE ScriptName='spell_hun_pet_carrion_feeder';