Auditing self-hosted instance-level configuration changes - 2

For audit purposes, GitLab stores configuration events as audit logs. For self hosted, we need to audit the following events:

• Update self-hosted model

Contributor docs on audit events: https://docs.gitlab.com/ee/development/audit_event_guide/ User docs on audit events: https://docs.gitlab.com/ee/user/compliance/audit_events.html