Use media_duplicates module as dependency for hash duplicate checking

Setting this to major, as the current hashes' implementation is really not covering many media entities, if we need to migrate to multiple media reference fields.

Might be worth reworking the whole thing through creating a dependency on https://www.drupal.org/project/media_duplicates → and use its logic, as it might be superior (or not).

Yes, media_duplicates is the correct approach, this is more mature and ensures it works for all media.
Eventually some services for external calls need to be added there.

Also it has the better implementation and basis for additional features.