Salieri: shader cache (#1701)

Here come Salieri, my implementation of a disk shader cache!

"I'm sure you know why I named it that."
"It doesn't really mean anything."

This implementation collects shaders at runtime and cache them to be later compiled when starting a game.

Ryujinx.Graphics.GAL/IRenderer.cs

@@ -27,6 +27,8 @@ namespace Ryujinx.Graphics.GAL
 
         Capabilities GetCapabilities();
 
+        IProgram LoadProgramBinary(byte[] programBinary);
+
         void SetBufferData(BufferHandle buffer, int offset, ReadOnlySpan<byte> data);
 
         void UpdateCounters();