### What this PR does / why we need it?
Fix UTs on register customop and warm up model
### How was this patch tested?
CI passed with existing test.
Co-authored-by: Icey <1790571317@qq.com>
- vLLM version: main
- vLLM main:
cc99baf14d
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Signed-off-by: MengqingCao <cmq0113@163.com>