### What this PR does / why we need it?
This PR fixes the issue where the previous PR
https://github.com/vllm-project/vllm-ascend/pull/5733 failed to install
Clang in nightly environment.
- vLLM version: v0.13.0
- vLLM main:
bde38c11df
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Signed-off-by: Meihan-chen <jcccx.cmh@gmail.com>