docs: Add PII annotations to models

[bmtcril]

TL;DR -

Per OEP-30 these annotations should live with the models. This is just moving the existing edx-platform overrides to the correct location.

What changed?

• Annotation added to model comments

Developer Checklist

I don't believe these changes merit a release on their own.

Reviewer Checklist

Collectively, these should be completed by reviewers of this PR:

• I've done a visual code review
• I've tested the new functionality

FYI: @openedx/content-aurora

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.29%. Comparing base (e7eeb4c) to head (f205f78).
Report is 18 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2252   +/-   ##
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  Coverage   95.29%   95.29%           
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  Files         195      195           
  Lines       21624    21624           
  Branches     1502     1502           
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  Hits        20606    20606           
  Misses        771      771           
  Partials      247      247           

Flag	Coverage Δ
unittests	95.29% <ø> (ø)

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[bmtcril]

FWIW there was a flaky 3.11 - js test, re-running the test cleared it.

[bmtcril]

@openedx/2u-aurora do any of you have time to review this quick PR?