### What this PR does / why we need it?
The current community lacks unit tests (UT) for files such as
torchair_worker, mtp_proposer, and model_runner. Therefore, UT coverage
for these files needs to be added.
### Does this PR introduce _any_ user-facing change?
NO
### How was this patch tested?
- vLLM version: v0.11.0
- vLLM main:
2918c1b49c
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Signed-off-by: CodeNine-CJ <chenjian343@huawei.com>
e332e27ec3