Documented `uvloop` pattern is deprecated

[tjkuson]

Currently, the documentation suggests

import pytest
import uvloop


@pytest.fixture(scope="session")
def event_loop_policy():
    return uvloop.EventLoopPolicy()

EventLoopPolicy was deprecated in MagicStack/uvloop#638.

[seifertm]

That makes sense. The policy system is also deprecated as of Python 3.14.

pytest-asyncio doesn't really have a replacement yet. We want to keep the possibility to test with different loops, but didn't really find a suitable API for this so far. There's a draft PR that introduces a loop_factory argument to the asyncio marker, but it has some limitations.

[tjkuson]

I assume you meant to link to #1164?

Thanks for explaining, I'll read the thread and see if I have ideas when I next have some free time...