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/Mobiles/BaseCreature.cs

@@ -3800,8 +3800,7 @@ namespace Server.Mobiles
             }
 
             using var queue = PooledRefQueue<Mobile>.Create();
-            var eable = master.GetMobilesInRange(3);
-            foreach (var m in eable)
+            foreach (var m in master.GetMobilesInRange(3))
             {
                 if (m is BaseCreature
                         { Controlled: true, ControlOrder: OrderType.Guard or OrderType.Follow or OrderType.Come } pet &&
@@ -5346,9 +5345,8 @@ namespace Server.Mobiles
                 return;
             }
 
-            var eable = GetMobilesInRange(AuraRange);
             using var queue = PooledRefQueue<Mobile>.Create();
-            foreach (var m in eable)
+            foreach (var m in GetMobilesInRange(AuraRange))
             {
                 if (m != this && CanBeHarmful(m, false) && (Core.AOS || InLOS(m)) &&
                     (m is BaseCreature bc && (bc.Controlled || bc.Summoned || bc.Team != Team) || m.Player))