[TW 146] Custom/Scripts: Val'yr Charge

- EffectChargeDest was reverted at some point so where still charging
own z location
- Same change in spellscript will charge at the player and go player pos
to trigger

```sql
DELETE FROM `spell_script_names` WHERE `spell_id` =74399;
INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES 
(74399, 'TW_spell_icc_valk_charge');

```