[Feature] support bos download retry (#5137)

* support bos download retry

* update code

* update code

fastdeploy/config.py

@@ -550,8 +550,6 @@ class ParallelConfig:
         self.use_internode_ll_two_stage: bool = False
         # disable sequence parallel moe
         self.disable_sequence_parallel_moe: bool = False
-        # enable async download features
-        self.enable_async_download_features: bool = False
 
         self.pod_ip: str = None
         # enable the custom all-reduce kernel and fall back to NCCL(dist.all_reduce).