fix: Fixes sending packets and sidesteps a major issue with stackalloc and PGO in .NET 8 (#1607)

### Summary
- Works around a sneaky edge case bug in the JIT with stackalloc where sometimes the buffer is not zero'd.
- Fixes SendDisplayBoatHS
- Fixes sending health bars in the `SendEverything()` logic.
- Fixes a bug in sizing for some string helper functions.

### Developer Note
We are enabled `SkipLocalsInit` - do not rely on `stackalloc` to be zero'd. To zero the buffer, use `span.Clear();`

Closes #1606

Projects/Server/Utilities/Utility.cs

@@ -1001,6 +1001,8 @@ public static class Utility
 
         var length = source.Length;
         Span<bool> list = stackalloc bool[length];
+        list.Clear();
+
         var sampleList = new T[count];
 
         var i = 0;
@@ -1025,6 +1027,8 @@ public static class Utility
 
         var length = source.Count;
         Span<bool> list = stackalloc bool[length];
+        list.Clear();
+
         var sampleList = new List<T>(count);
 
         var i = 0;
@@ -1049,6 +1053,7 @@ public static class Utility
 
         var length = source.Length;
         Span<bool> list = stackalloc bool[length];
+        list.Clear();
 
         var i = 0;
         do