Fix pre-main-jh pipeline
What does this MR do and why?
- skip upstream test, already raise question to upstream https://gitlab.com/gitlab-org/gitlab/-/merge_requests/136676#note_1706808565
- fix test helper method
gitlab_enable_admin_mode_sign_in
, useenable_admin_mode!
instread - fix
jh/spec/lib/gitlab/email/message/account_validation_spec.rb
, upstream renameverify-2.png
toverify.png