Core/Loot: Move loot rolls from Group to Loot

Port From (https://github.com/TrinityCore/TrinityCore/commit/3ef5079feeedfdafc9d3c1d9f865e96dbc77ecc8)

Source/Game/Entities/Player/Player.Fields.cs

@@ -240,6 +240,7 @@ namespace Game.Entities
         SceneMgr m_sceneMgr;
 
         Dictionary<ObjectGuid, Loot> m_AELootView = new();
+        List<LootRoll> m_lootRolls = new();                                     // loot rolls waiting for answer
 
         CUFProfile[] _CUFProfiles = new CUFProfile[PlayerConst.MaxCUFProfiles];
         float[] m_powerFraction = new float[(int)PowerType.MaxPerClass];