Is your feature request related to a problem?

currently, the async def _request(...)

• uses proxy from env first than from code
• it at the same time causes calling get env proxy from env and registry in each request(aka _request()) call.

Describe the solution you'd like

keep env proxy in session, and use after code proxy that provided by users
also should throw error for socks5 proxy since aiohttp does not work with socks5 currently

Describe alternatives you've considered

N/A

Related component

Client

Additional context

No response

Code of Conduct

• I agree to follow the aio-libs Code of Conduct