Bump container registry to v3.16.0 (gprd)

What does this MR do?

3.16.0 (2021-11-18)

Features

• gc: record event type for manifest tasks queued due to a tag delete or switch (e0d918a)
• gc: record event type for manifest tasks queued due to list delete (68828ea)

pre/gstg: !1359 (merged)

Related issues

Related to gitlab-org/container-registry#487 (closed) and gitlab-org/container-registry#489 (closed).

Author Check-list

Please read the Contributing document and once you do, complete the following:

• Assign to the correct reviewer per the contributing document
• Apply the correct metadata per the contributing document
• Link to related MRs for applying the changes on other environments
• Link to related Chef changes
• If necessary link to a Criticality 4 Change Request issue

Reviewer Check-list

• Reviewed the diff jobs to confirm changes are as expected
• No changes shown in the diffs not associated with this MR - This may require a rebase or further investigation

Applier Check-list

• Make sure there is no ongoing deployment for the affected envs before merging (see #announcements slack channel)