GitPod integration: implement automatic authorization for VS Code

Problem to solve

When a user utilizes GitPod integration in a project, VS Code extension in a dynamically created GitPod will not have access to the GitLab instance, and each time user will need to provide a token to be authorized.

Proposal

Investigate if it is possible to automatically authorize VS Code inside GitPod and implement it if possible.

Further details

I am not sure if this should be a part of this project or https://gitlab.com/gitlab-org/gitlab/, so feel free to move it there.

Links / references

One of our Premium customers would like to have this functionality: internal ZD ticket.