Remove Visitor Shuttles (Real) and also cleanup the event rule system to not break when I try to do this. (#41915)

* shelve

* halfway there

* borgar

* just pass TimeSpan.Zero????

* better API

* no more TODO

* comment

* some fixes

* Gonna make a new PR for this I guess shrug

* add quark back, cleanup some stuff

* add syndie pod back

* one final change

---------

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>

Content.Shared/EntityTable/EntityTableSystem.cs

@@ -26,6 +26,17 @@ public sealed class EntityTableSystem : EntitySystem
         ctx ??= new EntityTableContext();
         return table.GetSpawns(rand, EntityManager, _prototypeManager, ctx);
     }
+
+    // TODO: Have this method be much better for entity tables
+    public IEnumerable<EntProtoId> ListSpawns(EntityTableSelector? table, System.Random? rand = null, EntityTableContext? ctx = null)
+    {
+        if (table == null)
+            return new List<EntProtoId>();
+
+        rand ??= _random.GetRandom();
+        ctx ??= new EntityTableContext();
+        return table.ListSpawns(rand, EntityManager, _prototypeManager, ctx);
+    }
 }
 
 /// <summary>