Allow for granular per-file authorization and related display for the PDF viewer in addition to the purl object level location restriction handling

[hudajkhan]

Currently, file_auth_controller checks authorization on all the files, and renders the viewer for the first file that corresponds to specific access/authorization rules. When the user clicks on other files in the content list, no further authorization checks are made.

This issue may intersect with how the contents list is created in the first place and whether we do (or do not) want specific items in the contents list to display.

Example item with multiple PDFs: https://sul-purl-stage.stanford.edu/gm706hs4976