Merge branch '391998-cleanup-in-the-welcome-controller' into 'master'

Resolve "Cleanup in the welcome controller"

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/119534



Merged-by: Doug Stull <dstull@gitlab.com>
Approved-by: Doug Stull <dstull@gitlab.com>
Approved-by: Serhii Yarynovskyi <syarynovskyi@gitlab.com>
Co-authored-by: Roy Liu <rliu@gitlab.com>