Core/Conditions: Added conditions for old areatrigger system (AreaTrigger.db2)

Port From (https://github.com/TrinityCore/TrinityCore/commit/6ebd5926fb61a5457d7048504d2f92bc3c9318ab)

Source/Game/Conditions/ConditionManager.cs

@@ -1111,6 +1111,13 @@ namespace Game
                         return false;
                     }
                     break;
+                case ConditionSourceType.AreatriggerClientTriggered:
+                    if (!CliDB.AreaTriggerStorage.ContainsKey(cond.SourceEntry))
+                    {
+                        Log.outError(LogFilter.Sql, $"{cond} SourceEntry in `condition` table, does not exists in AreaTrigger.db2, ignoring.");
+                        return false;
+                    }
+                    break;
                 default:
                     Log.outError(LogFilter.Sql, $"{cond.ToString()} Invalid ConditionSourceType in `condition` table, ignoring.");
                     return false;

Source/Game/Handlers/MiscHandler.cs

@@ -195,6 +195,9 @@ namespace Game
             if (player.IsDebugAreaTriggers)
                 player.SendSysMessage(packet.Entered ? CypherStrings.DebugAreatriggerEntered : CypherStrings.DebugAreatriggerLeft, packet.AreaTriggerID);
 
+            if (!Global.ConditionMgr.IsObjectMeetingNotGroupedConditions(ConditionSourceType.AreatriggerClientTriggered, atEntry.Id, player))
+                return;
+
             if (Global.ScriptMgr.OnAreaTrigger(player, atEntry, packet.Entered))
                 return;