### What this PR does / why we need it?
As the vllm-ascend main doesn't maintain v0.17.0 now, we'd just apply
the single branch in eagle proposer. Otherwise it will raise error in
v0.18.0
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
CI passed with existing test.
- vLLM version: v0.18.0
- vLLM main:
8b6325758c
Signed-off-by: MengqingCao <cmq0113@163.com>