fix: Changes Map.Sector.Mobiles to link list & Fixes various related crash bugs (#1553)

### Summary

Eliminates `IPooledEnumerable<T>` and `eable.Free()` from `Map` for mobiles. This drastically simplifies code that iterates in range, for example:

```cs
foreach (var m in m.GetMobilesInRange(5))
{
}
```
The code above no longer requires an eable and calling `Free()`.

- [X] Fixed several locations where an NPC that was damaged would cause a server crash.
- [X] Removed an unnecessary allocation in guard fake calls (NPCs calling guards on you)
- [X] Fixes damage precision loss in Poison Strike Spell
- [X] BogThing no longer attempts to "search" for boglings to eat when it is at full health

Projects/UOContent/Skills/Tracking/Tracking.cs

@@ -210,20 +210,17 @@ namespace Server.SkillHandlers
                 from.SendGump(new TrackWhoGump(from, mobs, range));
                 from.SendLocalizedMessage(1018093); // Select the one you would like to track.
             }
+            else if (type == 0)
+            {
+                from.SendLocalizedMessage(502991); // You see no evidence of animals in the area.
+            }
+            else if (type == 1)
+            {
+                from.SendLocalizedMessage(502993); // You see no evidence of creatures in the area.
+            }
             else
             {
-                if (type == 0)
-                {
-                    from.SendLocalizedMessage(502991); // You see no evidence of animals in the area.
-                }
-                else if (type == 1)
-                {
-                    from.SendLocalizedMessage(502993); // You see no evidence of creatures in the area.
-                }
-                else
-                {
-                    from.SendLocalizedMessage(502995); // You see no evidence of people in the area.
-                }
+                from.SendLocalizedMessage(502995); // You see no evidence of people in the area.
             }
         }