[Upstream] Review xai-org/grok-build changes

[github-actions]

A newer state of xai-org/grok-build is available for review.

• Last reviewed commit: afbc0fb710320c7add294c2106d447ecc3e3af2e
• Current upstream commit: eb267feff13129e568df38fb6fdf0ceb65f735d6
• Last reviewed upstream version: 1.0.0
• Current upstream version: 1.0.3
• Last reviewed release: none
• Current upstream release: none

Review and port relevant changes according to the upstream sync procedure. Do not merge upstream wholesale or update .github/upstream.json before the selected changes pass the Chutes Build quality gates.