misc: Migrate usage of RuntimeInformation to OperatingSystem (#2901)

Very basic migration across the codebase.

Ryujinx.Common/System/WindowsMultimediaTimerResolution.cs

@@ -2,12 +2,14 @@
 using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
 
 namespace Ryujinx.Common.System
 {
     /// <summary>
     /// Handle Windows Multimedia timer resolution.
     /// </summary>
+    [SupportedOSPlatform("windows")]
     public class WindowsMultimediaTimerResolution : IDisposable
     {
         [StructLayout(LayoutKind.Sequential)]