Bug 1608838: Add data sensitivity category metadata

[mdboom]

This was scraped from the linked data reviews.

---

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.

[psymoon]

@mdboom does this need data review?

[mdboom]

@mdboom does this need data review?

I don't think so -- it's just moving information already in data reviews to a more structured form. But let me ping a data reviewer (@chutten) for confirmation.

[chutten]

No Data Review required. The data collections being modified aren't being expanded or added to, just their metadata being trimmed up.

[psymoon]

bors r+

[bors]

Build succeeded:

• complete-push