Add the Package Registry to the list of audited events
### Context
As a customer in a regulated industry, you may need to respond to auditors by generating comprehensive reports. You can use GitLab to generate audit reports, which track a [number of instance, group, and project events](https://docs.gitlab.com/ee/administration/audit_events.html#project-events).
### Problem to solve
Package events such as the ones below are not included in the audit report.
* Change action (add, modify, delete, etc)
* Who/what made the change (user, retention policy, etc)
* What package was changed
* When the package was changed
* How the package was changed (manual, pipeline, API, etc)This is currently provided in Artifactory logs and UI (last known change).
### Proposal
Consider adding Package Registry events to the GitLab Audit report so that customers have a way of auditing changes to packages.
issue