Add IPv6 address when emulating links functionality

Closes #39173 and #39172

See merge request !6027



Merged-by: Axel von Bertoldi <avonbertoldi@gitlab.com>
Approved-by: Axel von Bertoldi <avonbertoldi@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Co-authored-by: Arran Walker <ajwalker@gitlab.com>
(cherry picked from commit c17a65b7)