Remove un-necessary socket requirements in async tests

Proposal:

the builtins async tests should run coroutines using coro.send(None) because they don't need an async framework to run. This would remove asyncio from the tests and support running on emscripten/wasi

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-128403
• gh-128435
• gh-128436
• gh-128443
• gh-156808

从提案中描述的 builtins async 测试开始，检查它们当前如何使用 asyncio。将依赖 framework 的执行替换为所述的 coroutine 入口点，然后确认测试不再需要 asyncio，并且可以支持 emscripten/wasi；链接的 PRs 表明这项工作已经在进行中。