Bump @vscode/test-electron from 1.6.2 to 2.4.0 (#1711)

Bumps [@vscode/test-electron](https://github.com/Microsoft/vscode-test) from 1.6.2 to 2.4.0.
- [Changelog](https://github.com/microsoft/vscode-test/blob/main/CHANGELOG.md)
- [Commits](microsoft/vscode-test@v1.6.2...v2.4.0)

---
updated-dependencies:
- dependency-name: "@vscode/test-electron"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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