[Cherry Pick from pr#3981][0.11.0][P/D]Make kv-transfer env variable take effect & Fix load-balance proxy#3983

MengqingCao merged 2 commits intovllm-project:v0.11.0-devvllm-project/vllm-ascend:v0.11.0-devfrom

nwpu-zxr:add_timeout_v011nwpu-zxr/vllm-ascend:add_timeout_v011Copy head branch name to clipboard