Missing Spinach steps for Admin "Help Text" feature

gitlab-ce@0469e7dffd13646a211a456341c9459b8ff5f7ad converted this feature to RSpec, but there was an EE-only feature that was left behind, but there are no defined steps for it.

Spinach is complaining about the lack of step file but is not failing builds because of it.

This is yet another reason we need to get rid of Spinach.

See https://dev.gitlab.org/gitlab/gitlab-ee/builds/253602 for an example of a build that contained the warning.