Scripts/GB: updated Forgemaster Throngus' scripts to new model, improved the internals and removed a few now deprecated spell scripts

sql/updates/world/4.3.4/2022_03_30_00_world.sql

@@ -0,0 +1,2 @@
+DELETE FROM `spell_script_names` WHERE `ScriptName` IN ('spell_throngus_flaming_arrow', 'spell_throngus_fixate_effect');
+UPDATE `creature_template` SET `ScriptName`= '', `AIName`= 'NullCreatureAI' WHERE `entry`= 40228;