Cleanup TabletopSystem.Map (#36097)

* Add SharedMapSystem dependency

* IMapManager.MapExists -> SharedMapSystem.MapExists

* IMapManager.CreateMap & IMapManager.GetMapEntityId -> SharedMapSystem.CreateMap

* IMapManager.DeleteMap -> SharedMapSystem.DeleteMap

* Remove IMapManager dependency

Content.Server/Tabletop/TabletopSystem.cs

@@ -12,7 +12,6 @@ using JetBrains.Annotations;
 using Robust.Server.GameObjects;
 using Robust.Shared.Configuration;
 using Robust.Shared.Enums;
-using Robust.Shared.Map;
 using Robust.Shared.Player;
 using Robust.Shared.Utility;
 
@@ -21,7 +20,7 @@ namespace Content.Server.Tabletop
     [UsedImplicitly]
     public sealed partial class TabletopSystem : SharedTabletopSystem
     {
-        [Dependency] private readonly IMapManager _mapManager = default!;
+        [Dependency] private readonly SharedMapSystem _map = default!;
         [Dependency] private readonly EyeSystem _eye = default!;
         [Dependency] private readonly ViewSubscriberSystem _viewSubscriberSystem = default!;
         [Dependency] private readonly PopupSystem _popupSystem = default!;