Test PR to diagnose runner issue

[quoctruong]

Add a step to check available TPU devices in the workflow.

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (alters existing behavior or a public API)
• Docs / tests / internal tooling (no user-facing behavior change)

Checklist

• I have read the contribution guidelines.
• Tests cover this change and pass locally.
• Public APIs and non-trivial functions are documented.
• If this change is user-facing, I have updated CHANGELOG.md under the [Unreleased] section (or the relevant checkpoint/ / export/ changelog).

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