Add integration test for Incremental Cardano DB client

[jpraynaud]

Why

The restoration of the Incremental Cardano DB needs to have an integration test implemented for better quality in the client.

What

Implement an integration test of the Incremental Cardano DB in the client.

How

• Implement an integration test of the Incremental Cardano DB in the client:
  • Adapt the snapshot_list_get_show_download_verify existing set
  • List artifacts
  • Get artifacts
  • Download artifacts (specific range not the full range, with ancillary)
  • Statistics