storage: RawExtrinsicMetadata: update to use the API in swh-model 1.0.0
Test Plan
Tests will fail because swh-model 1.0.0 is not released yet.
Migrated from D5176 (view on Phabricator)
Staging instance, all changes can be removed at any time
Tests will fail because swh-model 1.0.0 is not released yet.
Migrated from D5176 (view on Phabricator)