expose `enableWorkerThreads` in jest config

[sibelius]

🚀 Feature Proposal

I'd like to be able to turn worker threads when running jest

Motivation

I think worker threads can improve memory usage, and make tests run faster

Example

jest.config.js

module.exports = {
   enableWorkerThreads: true
}

Pitch

jest-worker already has an option to use worker threads (enableWorkerThreads)

[jeysal]

I believe #7637 is currently tracking the shipping of worker threads for Jest. I don't think we want a config option for this. Once it's stable, it should be the default in order to improve resource utilization. Right now, it is unfortunately not.

[sibelius]

patch-package for now https://gist.github.com/sibelius/c6ef3f0890814dd4163a9ada0cd739f1

[github-actions]

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