No completions for instances in F#

[colombod]

Describe the bug

Bug #607 is still present for F#

Please complete the following:

Which version of .NET Interactive are you using?
1.0.135702

• OS
  • Windows 10
  • macOS
  • Linux (Please specify distro)
  • iOS
  • Android
• Browser
  • Chrome
  • Edge
  • Firefox
  • Safari
• Frontend
  • Jupyter Notebook
  • Jupyter Lab
  • nteract
  • Visual Studio Code
  • Other (please specify)

[brettfo]

Dependent on dotnet/fsharp#9644.