Core/Units: Clear UNIT_NPC_EMOTESTATE on death (blizzlike)

Closes #15263
Closes #18027

src/server/game/Entities/Unit/Unit.cpp

@@ -11065,6 +11065,7 @@ void Unit::setDeathState(DeathState s)
         // do not why since in IncreaseMaxHealth currenthealth is checked
         SetHealth(0);
         SetPower(getPowerType(), 0);
+        SetUInt32Value(UNIT_NPC_EMOTESTATE, 0);
 
         // players in instance don't have ZoneScript, but they have InstanceScript
         if (ZoneScript* zoneScript = GetZoneScript() ? GetZoneScript() : GetInstanceScript())