Fix: super sidebar external link

What does this MR do and why?

Follow up for the https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120721, by exposing fine grained variables to enhance reusability and easy for overriding.

Describe in detail what your merge request does and why.

Fix: super sidebar external link

• Followup for the changes in the upstream.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.