feat: create new @jest/transform package

[SimenB]

Summary

Trying to make jest-runtime a bit smaller

Test plan

Green CI

[SimenB]

I had completely forgotten about this util 😅 Dropping the jest-config dep means this package is ready to be written in TS (followed by @jest/reporters), which is nice

[codecov-io]

Codecov Report

Merging #7915 into master will decrease coverage by 0.02%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #7915      +/-   ##
==========================================
- Coverage   57.91%   57.89%   -0.03%     
==========================================
  Files         164      165       +1     
  Lines        6093     6092       -1     
  Branches        6        5       -1     
==========================================
- Hits         3529     3527       -2     
- Misses       2562     2563       +1     
  Partials        2        2

Impacted Files	Coverage Δ
packages/jest-transform/src/ScriptTransformer.js	88.12% <ø> (ø)
packages/jest-transform/src/shouldInstrument.js	97.05% <ø> (ø)
packages/jest-runtime/src/index.js	73.57% <ø> (ø)	⬆️
packages/jest-runtime/src/helpers.js	100% <ø> (+9.52%)	⬆️
packages/jest-cli/src/runGlobalHook.js	0% <0%> (ø)	⬆️
...ckages/jest-reporters/src/generateEmptyCoverage.js	85.71% <100%> (ø)	⬆️
...est-transform/src/enhanceUnexpectedTokenMessage.js	33.33% <33.33%> (ø)

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[thymikee]

looks like lerna leftover

[SimenB]

yeah, not sure what purpose it serves, but I don't wanna delete it

[github-actions]

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