Support load Qwen1.5-72B-Chat-GPTQ-Int4 by auto_gptq

[HaiHui886]

Run Qwen1.5-72B-Chat-GPTQ-Int4 is much slower than Qwen1.5-72B-Chat by transformer package.
Quantited model need load by auto_gptq.

https://github.com/QwenLM/Qwen/blob/main/README_CN.md#%E6%8E%A8%E7%90%86%E6%80%A7%E8%83%BD

[depenglee1707]

Please take a try with the llama.cpp integration.
see this example: https://github.com/OpenCSGs/llm-inference/blob/main/models/text-generation--Qwen1.5-7B-Chat-GGUF.yaml