Avoid allocations in .Parse methods (#3760)

* Avoid allocations in .Parse methods

Use the Span overloads of the Parse methods when possible to avoid string allocations and remove one unnecessarry array allocation

* Avoid another string allocation

Ryujinx.Common/Utilities/EmbeddedResources.cs

@@ -129,7 +129,7 @@ namespace Ryujinx.Common
 
         private static (Assembly, string) ResolveManifestPath(string filename)
         {
-            var segments = filename.Split(new[] { '/' }, 2, StringSplitOptions.RemoveEmptyEntries);
+            var segments = filename.Split('/', 2, StringSplitOptions.RemoveEmptyEntries);
 
             if (segments.Length >= 2)
             {