Support subject_details_csv_collection in bulk export API

[benwbrum]

Jon Fackrell is trying to use the bulk export API, and needs access to the subject_details_csv_collection in the zip export. This should work, since it uses the same code under the hood as the UI does.

It looks like we added the new parameter to the UI and the UI controller, but not to the relevant place in the API controller.

This should be straightforward to fix, though reproduction scenarios might take a bit.

[benwbrum]

Be sure to modify the documentation to include any new format keys.