Merge branch '299298-spec-failure-in-ee-spec-features-epics-epic_show_spec-rb-epic-show-when-sub-epics-feature-is' into 'master' 

Fix and unquarantine epic tests for roadmap tab

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/130388



Merged-by: Simon Knox <simon@gitlab.com>
Approved-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Simon Knox <simon@gitlab.com>
Co-authored-by: Florie Guibert <fguibert@gitlab.com>