chore: ensure all exported files have a consistent filename

[SimenB]

Summary

This makes the tooling for bundling a bit cleaner. Also, consistency is always good to reduce any extra mental overhead..

This is not breaking since we do not support deep access of our modules, but I'll stick it in Jest 28 anyways just to be a bit nice to people doing illegal stuff

Test plan

Green CI

[codecov-commenter]

Codecov Report

Merging #12329 (a40c5dc) into main (55caeb7) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #12329      +/-   ##
==========================================
- Coverage   67.26%   67.26%   -0.01%     
==========================================
  Files         330      330              
  Lines       17352    17352              
  Branches     5071     5071              
==========================================
- Hits        11672    11671       -1     
- Misses       5648     5649       +1     
  Partials       32       32              

Impacted Files	Coverage Δ
packages/expect/src/utils.ts	96.09% <0.00%> (-0.49%)	⬇️

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[github-actions]

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