### What this PR does / why we need it?
Make the test_pipeline_parallel take effect in full test of CI.
### Does this PR introduce _any_ user-facing change?
NA
### How was this patch tested?
NA
- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0
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Signed-off-by: leo-pony <nengjunma@outlook.com>