Support deepseek api in translate task

[MaleicAcid]

DeepSeek claims to provide a cheap(especially when the input hits the cache) large model API service which is friendly to mainland China and not inferior to gpt-3.5 in AlignBench and MT-Bench.

DeepSeek has implemented Context Caching on Disk technology. ...For cache hits, DeepSeek charges $0.014 per million tokens, slashing API costs by up to 90%. ref@https://platform.deepseek.com/api-docs/zh-cn/news/news0802

DeepSeek claims to use an API format compatible with OpenAI. see ref@deepseek-api doc

[zh-plus]

We can now use the DeepSeek model, as it offers an OpenAI-compatible API.

lrcer = LRCer(chatbot_model='openai: deepseek-chat', base_url_config={'openai': 'https://api.deepseek.com'})

Remember to change your OPENAI_API_KEY value to the provided deepseek API key.