Add missing yarn lockfile for jest-cli

[SimenB]

Summary
Not sure why it's not here already. It only shows up on a clean clone, some weird caching error in Lerna?

Test plan

N/A

[thymikee]

No, it was removed accidentally. Thanks for bringing it back!

[codecov-io]

Codecov Report

Merging #3502 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3502   +/-   ##
=======================================
  Coverage   62.28%   62.28%           
=======================================
  Files         181      181           
  Lines        6700     6700           
  Branches        5        5           
=======================================
  Hits         4173     4173           
  Misses       2525     2525           
  Partials        2        2

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[github-actions]

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