Webview artifacts broken in codespaces

[ChristopherHX]

e.g. http://localhost:43071/_apis/pipelines/workflows/container/1?itemPath=Artifact+of+build+%28linux-x64%2C+true%29 as returned by the api server doesn't use the calling host with the port forwarding.

Removing the prefix in the ui code is also possible.

However alternatively remove this for the vscode extension and add it to a custom treeview