Use VCS access token from Artemis instead of asking for a password for Git operations

[b-fein]

Is your feature request related to a problem?

We use Artemis in combination with a GitLab and use the version-control-access-token feature to support Git clones via HTTP username+access token instead of a password.

In our setting users don’t even know their password for Artemis/GitLab since the authentication happens via SAML2 and therefore Artemis just sets a random one in the database on user registration.

Especially students therefore might not know where to find the password. In our case, it would be required to open Artemis in the regular browser and copy the access token from the full clone URL in a clone repo dialogue there.

Describe the solution you'd like

Orion automatically adds the username to the dialogue when asking for the credentials to clone a repository. It would be nice if it could also extract the version control access token from the user object received from Artemis and automatically add that to the relevant input field.

Describe alternatives you've considered

none