[CI][vulkan] shark55-ci produces 0s for yolov2-coco model

[hanhanW]

#24420 expands the machine pool for vulkan tests, but it exposes a bug on shark55-ci only: https://github.com/iree-org/iree/actions/runs/25762938040/job/75669682119

Passing log on shark01: https://github.com/iree-org/iree/actions/runs/25759270717/job/75658473454

[hanhanW]

I'm not able to reproduce it on my local machine either. Confirmed that it is shark55 specific issue