[CI] offline dspark e2e (#15187)

### What this PR does / why we need it?
Temporarily brought offline. The cases of speculative decoding need to
be rectified later.

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

### How was this patch tested?

- vLLM version: v0.27.1
- vLLM main:
https://github.com/vllm-project/vllm/commit/ba07e4a48fc951300d97eb506217dd530583dea3

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Signed-off-by: weiguihua2 <weiguihua2@huawei.com>