Electron Releases

Description of Change

Fixes #27893

The process.exit implementation in the main process is not aligned with upstream behavior from Node.js, most notably around process.exit() not using process.exitCode, and also around taking values as strings.

Adds test coverage for these and a few other test cases. Ideally we'd run Node.js' upstream tests for process.exit to ensure alignment, but ran into a few issues with those tests, so I'll pursue that later.

There's a minor unrelated change where I noticed there were two different describe blocks in the tests for process.stdout so I consolidated them.

Checklist

• I have built and tested this change
• I have filled out the PR description
• I have reviewed and verified the changes
• npm test passes
• tests are changed or added
• relevant API documentation, tutorials, and examples are updated and follow the documentation style guide
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes:

• Fixed an issue with the main process where process.exit() with no argument did not exit with process.exitCode
• Fixed handling of string value arguments to process.exit() in the main process