fix: Prepares for IPooledEnumerable removal (#1548)

### Summary

- Removes `IPooledEnumerable` (non-generic)
- Changes `IPooledEnumerable<T>` so that  `Free()` is replaced with the `IDisposable` pattern

Projects/UOContent/Engines/ConPVP/Games/BombingRun.cs

@@ -479,8 +479,6 @@ namespace Server.Engines.ConPVP
                             }
                         }
 
-                        eable.Free();
-
                         if (empty)
                         {
                             HitObject(point, landTop, 0);
@@ -569,8 +567,6 @@ namespace Server.Engines.ConPVP
                     {
                         continue;
                     }
-
-                    area.Free();
                     if (i is BRGoal goal)
                     {
                         var oldLoc = new Point3D(GetWorldLocation());
@@ -591,8 +587,6 @@ namespace Server.Engines.ConPVP
                     return;
                 }
 
-                area.Free();
-
                 var clients = Map.GetClientsInBounds(rect);
                 foreach (var ns in clients)
                 {
@@ -622,16 +616,12 @@ namespace Server.Engines.ConPVP
                         continue;
                     }
 
-                    clients.Free();
-
                     // TODO: probably need to change this a lot...
                     DoCatch(m);
 
                     return;
                 }
 
-                clients.Free();
-
                 m_PathIdx = pathCheckEnd;
 
                 if (m_PathIdx > 0 && m_PathIdx - 1 < m_Path.Count)
@@ -685,8 +675,6 @@ namespace Server.Engines.ConPVP
                     }
                 }
 
-                eable.Free();
-
                 Z = myZ;
                 m_Flying = false;
                 Visible = true;