Core/Spell: fix LoS checks for GameObject spells

Port From (https://github.com/TrinityCore/TrinityCore/commit/50fe2dc7e305fa32d30bac6ad0ced2e5647ac02b)

Source/Framework/Constants/Spells/SpellConst.cs

@@ -1464,7 +1464,7 @@ namespace Framework.Constants
         All = (Normal | Magic),
     }
 
-    [System.Flags]
+    [Flags]
     public enum SpellCastFlags : uint
     {
         None = 0x0,

Source/Game/Entities/GameObject/GameObjectData.cs

@@ -275,6 +275,19 @@ namespace Game.Entities
             }
         }
 
+        public uint GetRequireLOS() => type switch
+        {
+            GameObjectTypes.Button => Button.requireLOS,
+            GameObjectTypes.QuestGiver => QuestGiver.requireLOS,
+            GameObjectTypes.Chest => Chest.requireLOS,
+            GameObjectTypes.Trap => Trap.requireLOS,
+            GameObjectTypes.Goober => Goober.requireLOS,
+            GameObjectTypes.FlagStand => FlagStand.requireLOS,
+            GameObjectTypes.NewFlag => NewFlag.requireLOS,
+            GameObjectTypes.GatheringNode => GatheringNode.requireLOS,
+            _ => 0,
+        };
+
         public uint GetLockId()
         {
             switch (type)

Source/Game/Spells/Spell.cs

@@ -6557,6 +6557,12 @@ namespace Game.Spells
             if (m_spellInfo.HasAttribute(SpellAttr2.CanTargetNotInLos) || Global.DisableMgr.IsDisabledFor(DisableType.Spell, m_spellInfo.Id, null, (byte)DisableFlags.SpellLOS))
                 return true;
 
+            // check if gameobject ignores LOS
+            GameObject gobCaster = m_caster.ToGameObject();
+            if (gobCaster != null)
+                if (!gobCaster.GetGoInfo().GetRequireLOS())
+                    return true;
+
             // if spell is triggered, need to check for LOS disable on the aura triggering it and inherit that behaviour
             if (IsTriggered() && m_triggeredByAuraSpell != null && (m_triggeredByAuraSpell.HasAttribute(SpellAttr2.CanTargetNotInLos) || Global.DisableMgr.IsDisabledFor(DisableType.Spell, m_triggeredByAuraSpell.Id, null, (byte)DisableFlags.SpellLOS)))
                 return true;