Please add support for multi-root workspaces with different GOPATHs

[loganrosen]

Is your feature request related to a problem? Please describe. Sometimes I want to work on multiple projects in the same workspace that have different GOPATHs. When I try to do this, I get the following error message:

The Go language server is currently not supported in a multi-root set-up with different GOPATHs (<paths>)

Describe the solution you'd like I would like support to be added for multi-root workspaces with different GOPATHs to address the condition mentioned in the error message.

Describe alternatives you've considered I have to open the projects in separate workspaces or live with the lack of language server support.

Additional context N/A