child_process is empty with jsdom and production mode

[Aslemammad]

Describe the bug

pmndrs/valtio#801 (comment)

When the env is jsdom and the mode is production (or NODE_ENV is production), the child_process package is empty. This happens in v0.34.6 but not in v0.33.0.

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-uyuvnz?file=test%2Fbasic.test.ts,package-lock.json,vite.config.ts,package.json&initialPath=__vitest__/

System Info

System:
    OS: macOS 13.4.1
    CPU: (8) arm64 Apple M2
    Memory: 54.75 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.17.0 - ~/.nvm/versions/node/v18.17.0/bin
/node
    Yarn: 1.22.19 - ~/.local/share/pnpm/yarn
    npm: 9.6.7 - ~/.nvm/versions/node/v18.17.0/bin/np
m
    pnpm: 8.7.6 - ~/.local/share/pnpm/pnpm
  Browsers:
    Brave Browser: 118.1.59.117
    Chrome: 118.0.5993.88
    Safari: 16.5.2
  npmPackages:
    @vitest/coverage-v8: ^0.34.6 => 0.34.6 
    @vitest/ui: ^0.34.6 => 0.34.6 
    vite: ^4.5.0 => 4.5.0 
    vitest: ^0.34.6 => 0.34.6 

### Used Package Manager

npm

### Validations

- [X] Follow our [Code of Conduct](https://github.com/vitest-dev/vitest/blob/main/CODE_OF_CONDUCT.md)
- [X] Read the [Contributing Guidelines](https://github.com/vitest-dev/vitest/blob/main/CONTRIBUTING.md).
- [X] Read the [docs](https://vitest.dev/guide/).
- [X] Check that there isn't [already an issue](https://github.com/vitest-dev/vitest/issues) that reports the same bug to avoid creating a duplicate.
- [X] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/vitest-dev/vitest/discussions) or join our [Discord Chat Server](https://chat.vitest.dev).
- [X] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.

[stackblitz]

Start a new pull request in StackBlitz Codeflow.

• vitest-dev-vitest-uyuvnz (Open reproduction)

[sheremet-va]

Looks like this issue was resolved already.