fix(handlers): disable filesystem layer link metadata if the database is enabled

Closes gitlab-com/gl-infra/production#14260

See merge request gitlab-org/container-registry!1298



Merged-by: Stan Hu <stanhu@gmail.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Reviewed-by: Jaime Martinez <jmartinez@gitlab.com>
Reviewed-by: Hayley Swimelar <hswimelar@gitlab.com>
Co-authored-by: Hayley Swimelar <hswimelar@gitlab.com>

## [3.73.1](gitlab-org/container-registry@v3.73.0-gitlab...v3.73.1-gitlab) (2023-05-16)

### Bug Fixes

* **handlers:** disable filesystem layer link metadata if the database is enabled ([aae69ab8](gitlab-org/container-registry@aae69ab8))