Improve error handling when DOI creation fails

[mvandenburgh]

Currently, DOI creation happens after the published dandiset is created on our side and committed to the database (see https://github.com/dandi/dandi-archive/blob/master/dandiapi/api/services/publish/__init__.py#L184). This means that if the call to the datacite API to create a new DOI fails, the dandiset will remain published but without a DOI. The publish workflow should be updated to instead fail gracefully and roll back the publish if the call to the datacite API fails.

[waxlamp]

Even better would be to first create a draft DOI, and only continue on to perform the publish if that succeeds, and then finally promote the draft DOI to a prod DOI (which is an operation that can be retried until it succeeds).

(This is based on my tentative understanding of how Datacite works after hearing @danlamanna talk about this once.)