formatter: format record with no record ID
- Adds back support of the case where BibFormatObject also can support to work with records without any record ID.
Co-authored-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Co-authored-by: Guillaume Lastecoueres <guillaume.lastecoueres@cern.ch>
Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>