Added logic so that when we run `./scripts/stage_release.sh --native`
(for the `@native` version of the Node module), we drop a `use-native`
file next to `codex.js`. If present, `codex.js` will now run the Rust
CLI.
Ran `./scripts/stage_release.sh --native` and verified that when the
running `codex.js` in the staged folder:
```
$ /var/folders/wm/f209bc1n2bd_r0jncn9s6j_00000gp/T/tmp.efvEvBlSN6/bin/codex.js --version
codex-cli 0.0.2505220956
```
it ran the expected Rust version of the CLI, as desired.
While here, I also updated the Rust version to one that I cut today,
which includes the new shell environment policy config option:
https://github.com/openai/codex/pull/1061. Note this may "break" some
users if the processes spawned by Codex need extra environment
variables. (We are still working to determine what the right defaults
should be for this option.)
63deb7c369