chore: don't publish pretty-format/perf to npm

[thymikee]

Summary

No need to publish perf directory from pretty-format. 106KB less to download by consumers.

Before -> After:

npm notice package size:  170.2 kB -> 64.1 kB
npm notice unpacked size: 526.6 kB -> 263.9 kB

Test plan

npm pack

[jeysal]

👍 👍 👍

[codecov-io]

Codecov Report

Merging #9612 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #9612      +/-   ##
==========================================
+ Coverage   65.09%   65.11%   +0.01%     
==========================================
  Files         287      287              
  Lines       12145    12145              
  Branches     3007     3009       +2     
==========================================
+ Hits         7906     7908       +2     
+ Misses       3604     3603       -1     
+ Partials      635      634       -1

Impacted Files	Coverage Δ
packages/expect/src/utils.ts	96.22% <0%> (+1.25%)	⬆️

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[github-actions]

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