New de-en models

[kpu]

On valhalla in /fs/surtr0/heafield/{base,tiny11}-de-en there are new German->English student models based on the WMT21 submissions that include guided alignment. We should give them the 8-bit and lexical shortlist treatment then release them here.

[kpu]

de-en models deployed in:
http://data.statmt.org/bergamot/models/deen/deen.student.base.tar.gz
http://data.statmt.org/bergamot/models/deen/deen.student.tiny11.tar.gz
and mentioned in https://translatelocally.com/models.json
cc @lonnen @andrenatal

TODO: include them in this repo. Or, better, consolidate the translatelocally deployment with this students repo so we don't have two different formats.

[andrenatal]

Thanks @kpu . We'll proceed with the integrations