Try to skip grouping some ENA files
Try to skip grouping some ENA files

Some of the files end up too big when grouped (18G). Instead we just
skip grouping them. This will increase the number of jobs but not too
much (14 at writing) so it will be ok.

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline