Bump Container Registry to v3.73.0-gitlab

What does this MR do?

3.73.0 (2023-05-08)

Features

• handlers: log unknown layer media types (e53aee9)

Related issues

Release Version v3.73.0-gitlab (gitlab-org/container-registry#1007 - 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