[CI] Add full ut protection for dspark (vllm-project#12791)

### What this PR does / why we need it?
Add more dspark functions in ut to make sure the safety of them. Using
ut has monitored more potential threats that may arise.

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
ut and tests

- vLLM version: v0.25.1
- vLLM main:
vllm-project/vllm@fe784ff

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Signed-off-by: lilinsiman <lilinsiman@gmail.com>

Author: lilinsiman