Calculate vertex buffer sizes from index buffer (#1663)

* Calculate vertex buffer size from maximum index buffer index

* Increase maximum index buffer count for it to be considered profitable for counting

Ryujinx.Graphics.Gpu/GraphicsConfig.cs

@@ -33,6 +33,11 @@ namespace Ryujinx.Graphics.Gpu
         /// </summary>
         public static bool EnableMacroJit = true;
 
+        /// <summary>
+        /// Enables or disables vertex buffer size detection from the index buffer, for indexed draws.
+        /// </summary>
+        public static bool EnableIndexedVbSizeDetection = true;
+
         /// <summary>
         /// Title id of the current running game.
         /// Used by the shader cache.