[feat] 去除PandoraNext相关服务依赖选项，并修改部分配置名，Respect Pandora！

data/config.json

@@ -3,8 +3,8 @@
     "need_log_to_file": "true",
     "process_workers": 2,
     "process_threads": 2,
-    "pandora_base_url": "",
-    "pandora_api_prefix": "",
+    "upstream_base_url": "",
+    "upstream_api_prefix": "",
     "backend_container_url": "",
     "backend_container_api_prefix": "",
     "key_for_gpts_info": "",
@@ -13,7 +13,6 @@
     "gpt_3_5_new_name": "gpt-3.5-turbo",
     "need_delete_conversation_after_response": "true",
     "use_oaiusercontent_url": "false",
-    "use_pandora_file_server": "true",
     "custom_arkose_url": "false",
     "arkose_urls": "",
     "dalle_prompt_prefix": "请严格根据我的以下要求完成绘图任务，如果我没有发出指定的绘画指令，则绘制出我发出的文字对应的图片：",