[Fix] fix_vllm_moe_quant

[belovedxixi]

Detail:
Alibaba benchmark test script quantizes a float model using vllm by giving in the parameters --quantization fp8 and --kv_cache_dtype fp8.
They don't use quark quantized model,
When using the 'moe_final_v0.6.0_Nov19' to do benchmark test for mixtral 8*7B, we got garbage output.
After checking, it was found that it was caused by a code missing in the vllm/model_executor/layers/quantization/fp8.py (For moe model,the func fuse_shuffle and moe_padding were not executed if using vllm to quantize model, and If passed to the vllm a quantized model, the two func can be executed correctly without errors ).