fix(treeProcessor): revert a small change from the #5585 refactoring

[niieani]

Summary

Fixes #5964 by partly restoring behavior from before #5585.

Moves the wrapChildren into higher scope to enforce undocumented execution order of beforeEach added inside of tests.

[SimenB]

Should we add a test for this? But not document it, as IMO this behavior is not something anyone should depend on

[codecov-io]

Codecov Report

Merging #6006 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #6006      +/-   ##
==========================================
- Coverage   64.32%   64.32%   -0.01%     
==========================================
  Files         217      217              
  Lines        8312     8313       +1     
  Branches        3        4       +1     
==========================================
  Hits         5347     5347              
- Misses       2964     2965       +1     
  Partials        1        1

Impacted Files	Coverage Δ
packages/jest-jasmine2/src/tree_processor.js	0% <0%> (ø)	⬆️

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[niieani]

I don't believe I have enough context to write a good test for this.

If somebody (@mjesun maybe?) with better knowledge of how Facebook depends on this behavior wants to write an integration test, go for it.

[mjesun]

You can use the one I put up on the issue as an integration test, asserting console.log output. That'd be excellent!

[cpojer]

I'll merge it, we can add a test in a separate PR.

[github-actions]

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