Merge branch '435201-expand-schema' into 'master'

Expand event schema to allow `internal_events`

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144661



Merged-by: Ankit Panchal <apanchal@gitlab.com>
Approved-by: Ankit Panchal <apanchal@gitlab.com>
Reviewed-by: Ankit Panchal <apanchal@gitlab.com>
Co-authored-by: Jonas Larsen <jlarsen@gitlab.com>