DRYD-1399: RestrictedMedia

[mikejritter]

What does this do?

• Add RestrictedMedia record type
• Add RestrictedMedia tests

Why are we doing this? (with JIRA link)
Jira: https://collectionspace.atlassian.net/browse/DRYD-1399

This adds record type for RestrictedMedia, which is intended for use in workflows where there may be sensitive media which should not be immediately accessible.

How should this be tested? Do these changes have associated tests?

• Run npm run lint and npm run test as a sanity check
• Run the devserver npm run devserver
• Test that the restrictedmedia resource can save and upload blobs

Dependencies for merging? Releasing to production?
This will eventually need a new type of view for the blob to prevent the thumbnail from automatically showing.

Has the application documentation been updated for these changes?
No

Did someone actually run this code to verify it works?
@mikejritter tested locally against the old PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.16%. Comparing base (020cb7a) to head (2f77e03).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #240      +/-   ##
==========================================
- Coverage   98.17%   98.16%   -0.01%     
==========================================
  Files         597      605       +8     
  Lines       12720    12771      +51     
  Branches     2613     2620       +7     
==========================================
+ Hits        12488    12537      +49     
- Misses        229      231       +2     
  Partials        3        3              

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