Merge branch '454761-add-feature_enabled_by_namespace_ids-to-event-definition-schema' into 'master' 

Add feature_enabled_by_namespace_ids to the documentation and CLI

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/157133



Merged-by: Joe Woodward <jwoodward@gitlab.com>
Approved-by: Sarah Yasonik <syasonik@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Joe Woodward <jwoodward@gitlab.com>
Reviewed-by: Sarah Yasonik <syasonik@gitlab.com>
Co-authored-by: Niko Belokolodov <nbelokolodov@gitlab.com>