Remove in-publication status from ATBD workflow

[oliverroick]

Backend changes for #480

• Removes the in-publication status (PUBLICATION)
• Removes corresponding permissions, events and email templates
• Changes permission ACLs so ATBDs can be moved from publication requested to public (PUBLISHED)

[naomatheus]

@oliverroick I am still getting 422 unprocessable entity for publications approvals with the change. In api/v2/events.py does the accept_publication status at line ~335 actually need to stay by chance?

[oliverroick]

@naomatheus

In api/v2/events.py does the accept_publication status at line ~335 actually need to stay by chance?

I don't think so, because that would move the publication to the in publication status, which we're not using any more. Do you have the logs from the backend that lead to the error?

[naomatheus]

Reviewed and approving. Apologies for the delay, was out having reviewed this.