Core/Auras: Implement spell effect attribute NoScaleWithStack (0x40)

Port From (https://github.com/TrinityCore/TrinityCore/commit/b832ed2479c039958bce40c3c26294fc67acf744)

Source/Framework/Constants/CliDBConst.cs

@@ -1672,6 +1672,16 @@ namespace Framework.Constants
         CooldownExpiresAtDailyReset = 0x08
     }
 
+    public enum SpellEffectAttributes
+    {
+        None = 0,
+        UnaffectedByInvulnerability = 0x01, // not cancelled by immunities
+        NoScaleWithStack = 0x40,
+        StackAuraAmountOnRecast = 0x8000, // refreshing periodic auras with this attribute will add remaining damage to new aura
+        AllowAnyExplicitTarget = 0x100000,
+        IgnoreDuringCooldownTimeRateCalculation = 0x800000
+    }
+
     public enum SpellProcsPerMinuteModType : byte
     {
         Haste = 1,

Source/Game/DataStorage/Structs/S_Records.cs

@@ -271,7 +271,7 @@ namespace Game.DataStorage
         public uint EffectIndex;
         public uint Effect;
         public float EffectAmplitude;
-        public int EffectAttributes;
+        public SpellEffectAttributes EffectAttributes;
         public uint EffectAuraPeriod;
         public float EffectBonusCoefficient;
         public float EffectChainAmplitude;

Source/Game/Spells/Auras/AuraEffect.cs

@@ -122,7 +122,8 @@ namespace Game.Spells
             }
 
             GetBase().CallScriptEffectCalcAmountHandlers(this, ref amount, ref m_canBeRecalculated);
-            amount *= GetBase().GetStackAmount();
+            if (!GetSpellEffectInfo().EffectAttributes.HasFlag(SpellEffectAttributes.NoScaleWithStack))
+                amount *= GetBase().GetStackAmount();
             return amount;
         }
         public void CalculatePeriodic(Unit caster, bool resetPeriodicTimer = true, bool load = false)

Source/Game/Spells/SpellInfo.cs

@@ -3666,6 +3666,7 @@ namespace Game.Spells
             Scaling.Coefficient = effect.Coefficient;
             Scaling.Variance = effect.Variance;
             Scaling.ResourceCoefficient = effect.ResourceCoefficient;
+            EffectAttributes = effect.EffectAttributes;
 
             ImplicitTargetConditions = null;
 
@@ -4408,6 +4409,7 @@ namespace Game.Spells
         public FlagArray128 SpellClassMask;
         public float BonusCoefficientFromAP;
         public List<Condition> ImplicitTargetConditions;
+        public SpellEffectAttributes EffectAttributes;
         public ScalingInfo Scaling;
 
         ImmunityInfo _immunityInfo;