Merge branch '521971-variables-inputs-banner' into 'master'

Pipeline inputs: variables > inputs banner

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183407



Merged-by: Laura Montemayor <lmontemayor@gitlab.com>
Approved-by: Sunjung Park <spark@gitlab.com>
Approved-by: Anna Vovchenko <avovchenko@gitlab.com>
Approved-by: Laura Montemayor <lmontemayor@gitlab.com>
Reviewed-by: Anna Vovchenko <avovchenko@gitlab.com>
Co-authored-by: Briley Sandlin <bsandlin@gitlab.com>