Bump container registry to v3.38.0

What does this MR do?

3.38.0 (2022-04-07)

Bug Fixes

• cleanup migration error when retrying a failed import (b749274)
• handlers: update import status when failed with a different context (e3e7c1f)

Features

• handlers: expose migration_error to GET import route (37af549)
• handlers: force final import cancellation (becaea6)

Related issues

Related to gitlab-org/container-registry#642 (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

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Integration tests added to GitLab QA
• The impact any change in container size has should be evaluated