[Fix] Set global args in cpu test

[Fridge003]

Motivation

Ref: https://github.com/sgl-project/sglang/actions/runs/18797628553/job/53640903733?pr=12103
Fix CI fail

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.

[gemini-code-assist]

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