Implement non-OA metadata in export outputs

[tosteiner]

Is your feature request related to a problem? Please describe.
As a publisher, I want to be able to distribute metadata that pertains to non-OA titles. which isn't fully possible at the moment.

As a team, we'll need to decide if we want to enable such features.

Additional context

• JSTOR ONIX output currently not accurate for non-OA books (White Horse Press use case - fields such as <Unpriced Item Type> are output hard-coded); this is probably also the case for some other ONIX outputs
• SciELO publishers: Amanda notes many of them will likely be seeking to use Thoth to manage metadata also for books that are not in SciELO, and non-OA. ONIX fields for e.g. regional dissemination restrictions one particular field that would be needed and is currently missing.
• More generally, other hybrid presses would also benefit from from this expansion.

[rhigman]

Similarly to the point about ONIX, the MARC output also currently includes a blanket OA statement. This could be amended while fixing #525 (e.g. move under the CC licence check, as per the incorrectly-implemented 1c8a0ce).

[rhigman]

To be implemented based on assuming that works with a licence URL supplied are OA, and works without are non-OA.

[rhigman]

#629 implements conditional outputting of existing OA-related information, but does not make any changes to the data model, e.g. to add storage of regional dissemination restrictions as mentioned in original description.