Merge branch 'chore/refactor-workitem-spec' into 'master'

[Chore] Refactor work item spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/173524



Merged-by: Arturo Herrero <arturo.herrero@gmail.com>
Approved-by: Arturo Herrero <arturo.herrero@gmail.com>
Co-authored-by: maddievn <mvanniekerk@gitlab.com>