v2.7.3-gitlab updates the storage driver to use the latest Google SDK:
https://gitlab.com/gitlab-org/container-registry/merge_requests/2

v2.7.4-gitlab fixes an issues with v2.7.3-gitlab with non-default
Google credentials:
https://gitlab.com/gitlab-org/container-registry/merge_requests/7

This registry upgrade hopefully will fix 0-byte upload issues:
https://github.com/googleapis/google-cloud-go/issues/746