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/Items/Misc/Acid.cs

@@ -64,7 +64,7 @@ public partial class Acid : Item
 
         using var queue = PooledRefQueue<Mobile>.Create();
 
-        foreach (var m in GetMobilesInRange(0))
+        foreach (var m in GetMobilesAt())
         {
             if (m.AccessLevel == AccessLevel.Player &&
                 m.Alive && !m.IsDeadBondedPet && (m is not BaseCreature bc || bc.Controlled || bc.Summoned))

Projects/UOContent/Items/Misc/Firebomb.cs

@@ -122,9 +122,8 @@ public partial class Firebomb : Item
                     }
                     else if (RootParent == null)
                     {
-                        var eable = Map.GetMobilesInRange(Location, 1);
                         using var targets = PooledRefQueue<Mobile>.Create();
-                        foreach (var m in eable)
+                        foreach (var m in Map.GetMobilesInRange(Location, 1))
                         {
                             if (m_LitBy == null || SpellHelper.ValidIndirectTarget(m_LitBy, m) &&
                                 m_LitBy.CanBeHarmful(m, false))

Projects/UOContent/Items/Misc/MorphItem.cs

@@ -78,8 +78,7 @@ public partial class MorphItem : Item
     public void Refresh()
     {
         var found = false;
-        var eable = GetMobilesInRange(CurrentRange);
-        foreach (var mob in eable)
+        foreach (var mob in GetMobilesInRange(CurrentRange))
         {
             if (!mob.Hidden || mob.AccessLevel <= AccessLevel.Player)
             {