Reduce install network flake (#27464)

## Summary

Avoids potentially flaky network calls leading to failures such as
https://app.circleci.com/pipelines/github/facebook/react/47096/workflows/b7966c1d-199c-4185-8d17-ac6485235c3a/jobs/727782.
Also makes install faster since we don't need the binary in CI
seemingly.

Electron itself is used to start the standalone binary.

## How did you test this change?

- [x] CI still passes without the binary downloaded. I'm just trusting
[their
docs](https://www.electronjs.org/docs/latest/tutorial/installation) here
that setting this actually ensures the binary isn't downloaded.