In https://gitlab.com/gitlab-org/gitlab/-/issues/367240, we chose a standardized format for events migrated from Redis to Snowplow. However, as explained by `@mikolaj_wawrzyniak` in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/94369#note_1056817687, the approach that we went with might not apply so well to aggregate metrics [an atomic event can belong to many different aggregates, so it could potentially have many different labels]. ## Implementation Plan [Context](https://gitlab.com/gitlab-org/gitlab/-/issues/370462#note_1098174575) 1. [x] Create new context schema in iglu repository https://gitlab.com/gitlab-org/iglu/-/merge_requests/79 1. [x] https://gitlab.com/gitlab-org/gitlab/-/issues/376241+ 1. [x] https://gitlab.com/gitlab-org/gitlab/-/issues/376242+ 1. [x] https://gitlab.com/gitlab-org/gitlab/-/issues/376243+ [MR](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/100487) 1. https://gitlab.com/gitlab-org/gitlab/-/issues/376244+ 1. https://gitlab.com/gitlab-org/gitlab/-/issues/376245+