Scope bug feature backstage security labels

Part of Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/60651#note_180825134.

Consider adding documentation to the handbook pages for Triage Operations when creating a new triage policy or triage package:

• https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/source/handbook/engineering/quality/guidelines/triage-operations/index.html.md