Core/Spells: Refactor Player::ApplySpellMod to take SpellInfo argument instead of just spell id

Port From (https://github.com/TrinityCore/TrinityCore/commit/624881bef5c90a91e4c59e5bf404d8775c2ca55d)

Source/Game/Combat/ThreatManager.cs

@@ -352,7 +352,7 @@ namespace Game.Combat
 
                 Player modOwner = hatedUnit.GetSpellModOwner();
                 if (modOwner != null)
-                    modOwner.ApplySpellMod(threatSpell.Id, SpellModOp.Threat, ref threat);
+                    modOwner.ApplySpellMod(threatSpell, SpellModOp.Threat, ref threat);
             }
 
             return hatedUnit.ApplyTotalThreatModifier(threat, schoolMask);