Scripts/BWD: several fixups for Maloriak's encounter

* Consuming Flames will now increase the periodic damage when taking damage
* Scorching Blast will now be cast on correct targets
* remove a wrongly assigned spell script name that was causing runtime errors log messages

sql/updates/world/4.3.4/2020_09_12_00_world.sql

@@ -0,0 +1,2 @@
+DELETE FROM `spell_script_names` WHERE `spell_id`= 77928;
+UPDATE `spell_proc` SET `ProcFlags`= 0, `SpellTypeMask`= 1 WHERE `SpellId` IN (77786, 92971, 92972, 92973);