Publish spacy-like models

We need to be able to publish current SpaCy models in the following form:

• the content of the parent folder of the path in "model" in the worker config
• in a new folder named model

This is a mix of the two existing arguments --rename and --use-parent-folder. The rename option is currently only allowed when processing a single file, that constraint will be lifted.

A small hack will be needed in the SpaCy worker to keep the current (non-generic) workers alive for now, but that hack is only temporary until the Generic worker works well.