Service: Scan method not generating correct RecordList

[jrcastro2]

Package version (if known): v0.16.1

Describe the bug

When executing a the scan function of the service we are supposed to receive a RecordList and by accessing hits, each element should be a RecordItem but instead it's only a dict.

Steps to Reproduce

1. Go to the terminal.
2. Access invenio shell by typing invenio shell.
3. Test the scan, here an example:

from invenio_rdm_records.proxies import current_rdm_records
from invenio_access.permissions import system_identity

service = current_rdm_records.records_service
records_list = service.scan(identity=system_identity)

for r in records_list.hits:
     print(r.__class__)

4. Note that it's a dict when it should be a RecordItem.

Expected behavior

Get RecordItem instead of a dict.

Screenshots (if applicable)

Additional context

[ppanero]

Similar behaviour here inveniosoftware/invenio-vocabularies#52 (comment) from the read_all function.