Cannot go to definition for FSharp.Core in .NET 10 Devcontainer

[serefarikan]

Describe the bug

Go to definition is not working when a devcontainer based on .NET 10 is used.

Steps to reproduce

Use connect to WSL feature of vs code under Windows (10)
From the vs code terminal, create a new folder, then open that folder in vs code
Use Add DevContainer configuration files feature of Vs Code, search for F# and add an F# devcontainer.
Change the image id in the devcontainer.json file to the latest as: "image": "mcr.microsoft.com/devcontainers/dotnet"
When Vs Code asks to open the directory in a devcontainer, allow it to do that.
After the devcontainer is built, use the vs code terminal to create a new classlib with F#, e.g. dotnet new classlib -lang F# -n MyLib" Use Reload Window action/feature of vs code Try to go to the definition of printfnin theLibrary.fs` file.

Link to sample reproduction

Please see this gist

Expected behaviour

Go to definition works as demonstrated here: #1092 (comment)

Screenshots

Machine infos

• OS: Windows 10, using WSL2, Docker Desktop with WSL backend
• .NET SDK version: 10.0.104
• Ionide version: 7.30.0

Additional context

It works as expected with .net 8, i.e. if we leave the auto generated image version: "image": "mcr.microsoft.com/devcontainers/dotnet:1-8.0",
It also works when the host windows machine (with .net SDK 10) is used to create the same library project, without using a devcontainer. So the issue emerges on the devcontainer scenario, with .net 10. Devcontainer with .net 8 image also works. "image": "mcr.microsoft.com/devcontainers/dotnet:1-9.0", also works, i.e. Devcontainer with .net 9.

[serefarikan]

I put some effort into this and created a PR. I have the patched version working as expected, and my suggested root cause and fix are in the PR. I do hope it'll be of use.