### What this PR does / why we need it?
Since the param `task` has been depprecated, we should use the latest
unified standard parameters for pooling models, this should be more
clear
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c
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Signed-off-by: wangli <wangli858794774@gmail.com>