fix: use correct arch for x64/arm64 code-release

[jonathanlab]

also add safeguards for bundling the right deps

[greptile-apps]

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

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### Issue 1 of 1
.github/workflows/code-release.yml:21
**Potentially non-existent runner label**

`macos-15-intel` is not a known GitHub-hosted runner label. macOS 15 (Sequoia) only runs on Apple Silicon; GitHub's Intel macOS runners top out at `macos-13` (and `macos-13-xlarge`). If this isn't a PostHog self-hosted runner label, the x64 job will queue indefinitely waiting for a runner that never becomes available, silently blocking the release. The standard label for an Intel x64 macOS runner would be `macos-13` or `macos-13-xlarge`.

_{Reviews (1): Last reviewed commit: "fix: use correct arch for x64/arm64 code..." | Re-trigger Greptile}