[Bugfix] Set openai proxy for class ZhiPuAPTAPI

[springasa]

When using ZHIPUAI as the large model provider, it is not possible to access ZHIPUAI in an HTTP proxy environment, and the following error will be reported: openai.error.APIConnectionError: Error communicating with OpenAI

So we need set proxy for class ZhiPuAPTAPI.

Features

#629

Feature Docs

Influence

Result

@springasa ➜ /workspaces/MetaGPT (bug-fix-proxy) $ pytest -vs tests/metagpt/provider/test_zhipuai_api.py 
2023-12-25 15:48:50.340 | INFO     | metagpt.const:get_metagpt_package_root:32 - Package root set to /workspaces/MetaGPT
============================================================ test session starts =============================================================
platform linux -- Python 3.11.4, pytest-7.3.1, pluggy-1.0.0 -- /usr/local/py-utils/venvs/pytest/bin/python
cachedir: .pytest_cache
rootdir: /workspaces/MetaGPT
plugins: mock-3.11.1, anyio-3.7.1, asyncio-0.23.2
asyncio: mode=Mode.STRICT
collected 3 items                                                                                                                            

tests/metagpt/provider/test_zhipuai_api.py::test_zhipuai_completion PASSED
tests/metagpt/provider/test_zhipuai_api.py::test_zhipuai_acompletion PASSED
tests/metagpt/provider/test_zhipuai_api.py::test_zhipuai_proxy PASSED

Other

[geekan]

It looks like there's room for optimization, but I'll get through first

[springasa]

Thank you for your feedback @geekan. I also agree that there is room for optimization, and these changes should be more appropriately placed in the parent class. However, making such a modification would have a significant impact. Therefore, the current changes are addressing the specific issues with the provider first.