Bump Container Registry to v3.11.1-gitlab

What does this MR do?

3.11.1 (2021-09-20)

Bug Fixes

• api/errcode: extract enclosed error from a storage driver catch-all error (800a15e)
• api/errcode: propagate 503 Service Unavailable status thrown by CGS (21041fe)
• gc: always propagate correlation ID from agent to workers (8de9c93)
• gc/worker: delete task if dangling manifest no longer exists on database (dffdd72)
• handlers: ignore tag not found errors when deleting a manifest (e740416)

Related issues

container-registry#458 (closed)

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion

Required

• Merge Request Title, and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com
• Pipeline is green on dev.gitlab.org if the change is touching anything besides documentation or internal cookbooks
• trigger-package has a green pipeline running against latest commit

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA
• Equivalent MR/issue for the GitLab Chart opened