add LFWPeople prototype dataset

[pmeier]

Closes #5344.

[facebook-github-bot]

💊 CI failures summary and remediations

As of commit dec0942 (more details on the Dr. CI page):

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• 1/1 failures introduced in this PR

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🕵️ 1 new failure recognized by patterns

The following CI failures do not appear to be due to upstream breakages:

binary_linux_wheel_py3.8_rocm4.5.2 (1/1)

Step: "packaging/build_wheel.sh" (full log | diagnosis details | 🔁 rerun)

Could not retrieve mirrorlist http://mirrorlist...se=7&arch=x86_64&repo=os&infra=container error was

+ setup_macos
++ uname
+ [[ Linux == Darwin ]]
+ setup_wheel_python
++ uname
+ [[ Linux == Darwin ]]
+ [[ linux-gnu == \m\s\y\s ]]
+ yum install -y libjpeg-turbo-devel freetype gnutls
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: HTTP Error 502 - Bad Gateway


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working

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