feat: build codex-responses-api-proxy for all platforms as part of the GitHub Release (#4406)

This should make the `codex-responses-api-proxy` binaries available for
all platforms in a GitHub Release as well as a corresponding DotSlash
file.

Making `codex-responses-api-proxy` available as an `npm` module will be
done in a follow-up PR.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/4404).
* __->__ #4406
* #4404
* #4403

codex-cli/scripts/build_npm_package.py

@@ -158,11 +158,8 @@ def stage_sources(staging_dir: Path, version: str) -> None:
         out.write("\n")
 
 
-def install_native_binaries(staging_dir: Path, workflow_url: str | None) -> None:
-    cmd = ["./scripts/install_native_deps.py"]
-    if workflow_url:
-        cmd.extend(["--workflow-url", workflow_url])
-    cmd.append(str(staging_dir))
+def install_native_binaries(staging_dir: Path, workflow_url: str) -> None:
+    cmd = ["./scripts/install_native_deps.py", "--workflow-url", workflow_url, str(staging_dir)]
     subprocess.check_call(cmd, cwd=CODEX_CLI_ROOT)