Core/Spells: moved Fingers of Frost charge dropping to AuraScript since it's actually stacks and not charges

sql/updates/world/custom/custom_2019_02_12_02_world.sql

@@ -0,0 +1,4 @@
+UPDATE `spell_proc` SET `Charges`= 0 WHERE `SpellId`=44544;
+DELETE FROM `spell_script_names` WHERE `ScriptName`= 'spell_mage_fingers_of_frost_charges';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(44544, 'spell_mage_fingers_of_frost_charges');