Decompiler needs to be updated to decompile .NET 10 assemblies

[gregg-miskelly]

Version Used: Visual Studio 18.0.0 Preview 1.0 [10510.66.main] / ICSharpCode.Decompiler Version 8.2.0.7535

Summary of the issue:
The version of ICSharpCode.Decompiler that ships with Rosyln cannot decompile .NET 10 binaries. This was fixed with icsharpcode/ILSpy#3349, which shipped in their 9.0 release, but VS isn't shipping 9.0 yet. I am opening this issue to track updating Rosyln to 9.0 (or updating in some other way if that is impossible for some reason).
 
Steps to Reproduce:

1. Create a .NET 10 class library
2. Add a "Hello World" method to it
3. Build it
4. Delete the PDB to ensure that the only way to allow "Go to definition" to work is through decompilation
5. Make a second project and reference the class library dll directly
6. Add a call to the hello world method
7. Right click on it and invoke Go To Definition

Expected Behavior:

Go to definition should decompile the class library

Actual Behavior:

Decompilation will fail and the metadata view will be used instead

[jasonmalinowski]

Assigning this to @dibarbet since he is currently sheparding the PR.

[dibarbet]

this should be fixed