Update ReadyToRun to use 9.0 package (#3340)

Directory.Packages.props

@@ -10,7 +10,7 @@
     <PackageVersion Include="DiffLib" Version="2017.7.26.1241" />
     <PackageVersion Include="Dirkster.AvalonDock.Themes.VS2013" Version="4.72.1" />
     <PackageVersion Include="FluentAssertions" Version="6.12.2" />
-    <PackageVersion Include="ILCompiler.Reflection.ReadyToRun.Experimental" Version="8.0.0-rc.2.23471.30" />
+    <PackageVersion Include="ILCompiler.Reflection.ReadyToRun.Experimental" Version="9.0.1-rtm.24557.9" />
     <PackageVersion Include="Iced" Version="1.21.0" />
     <PackageVersion Include="JunitXml.TestLogger" Version="4.1.0" />
     <PackageVersion Include="K4os.Compression.LZ4" Version="1.3.8" />

ILSpy.ReadyToRun/ReadyToRunLanguage.cs

@@ -30,6 +30,7 @@ using System.Runtime.CompilerServices;
 
 using ICSharpCode.AvalonEdit.Highlighting;
 using ICSharpCode.Decompiler;
+using ICSharpCode.Decompiler.Disassembler;
 using ICSharpCode.Decompiler.Metadata;
 using ICSharpCode.Decompiler.Solution;
 using ICSharpCode.Decompiler.TypeSystem;
@@ -96,6 +97,10 @@ namespace ICSharpCode.ILSpy.ReadyToRun
 		public void WriteReference(IMember member, string text, bool isDefinition = false)
 		{
 		}
+
+		public void WriteReference(MetadataFile metadata, Handle handle, string text, string protocol = "decompile", bool isDefinition = false)
+		{
+		}
 	}
 #endif
 

NuGet.config

@@ -4,7 +4,7 @@
     <clear />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
-    <add key="dotnet8-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8-transport/nuget/v3/index.json" />
+    <add key="dotnet9-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9-transport/nuget/v3/index.json" />
   </packageSources>
   <packageSourceMapping>
     <packageSource key="nuget.org">
@@ -12,7 +12,7 @@
       <package pattern="Microsoft.DiaSymReader.Native" />
       <package pattern="Microsoft.DiaSymReader" />
     </packageSource>
-    <packageSource key="dotnet8-transport">
+    <packageSource key="dotnet9-transport">
       <package pattern="ILCompiler.Reflection.ReadyToRun.Experimental" />
     </packageSource>
     <packageSource key="dotnet-tools">