Is your feature request related to a problem? Please describe.

The current s3 storage backend uses an API (s3/DeleteObjects) that is not supported by google cloud storage (GCS). https://issuetracker.google.com/issues/162653700

As a result, zot can't be used with GCS storage buckets.

Describe the solution you'd like

CNCF distribution has a GCS backend (https://distribution.github.io/distribution/storage-drivers/gcs/). Integrating that in zot would allow zot to use GCS buckets.

An alternative would be to provide a config option that replaces batch deletes with multiple single deletes.

Describe alternatives you've considered

We're looking into using the registry implementation in CNCF distribution so that we can use their GCS backend, but we'd prefer to use zot because it's more production-focused.

Additional context

No response