Send data to OpenGL host without client-side copies (#285)

* Directly send host address to buffer data

* Cleanup OGLShader

* Directly copy vertex and index data too

* Revert shader bind "cache"

* Address feedback

ChocolArm64/Memory/AMemory.cs

@@ -204,6 +204,13 @@ namespace ChocolArm64.Memory
             return Modified;
         }
 
+        public IntPtr GetHostAddress(long Position, long Size)
+        {
+            EnsureRangeIsValid(Position, Size, AMemoryPerm.Read);
+
+            return (IntPtr)(RamPtr + (ulong)Position);
+        }
+
         public sbyte ReadSByte(long Position)
         {
             return (sbyte)ReadByte(Position);