time: Make TimeZoneRule blittable and avoid copies (#3361)

* time: Make TimeZoneRule blittable and avoid copies

This drastically reduce overhead of using TimeZoneRule around the
codebase.

Effect on games is unknown

* Add missing Box type

* Ensure we clean the structure still

This doesn't perform any copies

* Address gdkchan's comments

* Simplify Box

Ryujinx.Common/Memory/Box.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.Common.Memory
+{
+    public class Box<T> where T : unmanaged
+    {
+        public T Data;
+
+        public Box()
+        {
+            Data = new T();
+        }
+    }
+}