Revert "Add new "setupTestFramework" option (#4976)"

[mjesun]

This reverts commit dbfd787. I had to manually revert because the Github UI seems broken.

[mjesun]

This is related to the reversion of #4970. Since it got also reverted, this out-of-the-sandbox option is not needed anymore (at least for now), so it's better to get back to the original setup.

[codecov-io]

Codecov Report

Merging #5025 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5025      +/-   ##
==========================================
- Coverage   60.42%   60.37%   -0.05%     
==========================================
  Files         198      198              
  Lines        6640     6637       -3     
  Branches        3        4       +1     
==========================================
- Hits         4012     4007       -5     
- Misses       2628     2630       +2

Impacted Files	Coverage Δ
packages/jest-config/src/valid_config.js	100% <ø> (ø)	⬆️
packages/jest-config/src/index.js	23.8% <ø> (ø)	⬆️
packages/jest-jasmine2/src/index.js	5.97% <ø> (+0.25%)	⬆️
packages/jest-config/src/normalize.js	92.94% <ø> (ø)	⬆️
packages/jest-validate/src/warnings.js	44.44% <0%> (-55.56%)	⬇️

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[cpojer]

Alright, let's do this for now.

[github-actions]

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