Merge branch '425293-add-pipeline-subscription' into 'master'

Build add pipeline subscription form

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141929



Merged-by: Jose Ivan Vargas <jvargas@gitlab.com>
Approved-by: Jose Ivan Vargas <jvargas@gitlab.com>
Reviewed-by: Briley Sandlin <bsandlin@gitlab.com>
Co-authored-by: Payton Burdette <pburdette@gitlab.com>