### What this PR does / why we need it?
This patch do some tiny optimization for nightly ci:
1. Polling the frequency with which the service prints logs when it
starts up in order to obtain useful information more quickly.
2. Shorten the timeout for waiting server
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c
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Signed-off-by: wangli <wangli858794774@gmail.com>