[Feat]support dynamic quantization in allgather (#2841)

### What this PR does / why we need it?
[Feat]support dynamic quantization in allgather
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: main
- vLLM main:
5931b7e5d9

Signed-off-by: withHades <244036962@qq.com>
Signed-off-by: WithHades <244036962@qq.com>

tests/e2e/multicard/test_qwen3_moe.py

@@ -66,7 +66,6 @@ def test_models_distributed_Qwen3_MOE_W8A8():
             max_model_len=8192,
             tensor_parallel_size=2,
             quantization="ascend",
-            enforce_eager=True,
     ) as vllm_model:
         vllm_model.generate_greedy(example_prompts, max_tokens)