[full, go] update to new go extension

[marcdumais-work]

The go extension by Microsoft is moving to the go community and will change publisher (and so id).

blog post: https://blog.golang.org/vscode-go
new repo: https://github.com/golang/vscode-go

[stale]

This contribution has been automatically marked as stale due to inactivity, and it will be closed if no further activity occurs. Thank you for contributing to Theia!

[marcdumais-work]

The newly moved extension looks to be available on open-vsx.org:
https://open-vsx.org/extension/golang/Go

[hyangah]

Should this config be updated to pick up the newer extension? I think Dockerfile, settings also need to be updated, but I am not familiar with this repo.

[vince-fugnitto]

Should this config be updated to pick up the newer extension? I think Dockerfile, settings also need to be updated, but I am not familiar with this repo.

@hyangah correct, occurrences of vscode-go (across the repository) should be updated to the new link as referenced by the #378 (comment). The dockerfile should only be updated if there is a need to update the development environment for go following the new changes (although I suspect no changes are necessary to make the extension work).