[`flake8-async`] Update `ASYNC100` to match upstream

[augustelalande]

Summary

Update the name of ASYNC100 to match upstream.

Also update to the functionality to match upstream by supporting additional context managers from asyncio and anyio. Matching this list.

Part of #12039.

Test Plan

Added the new context managers to the fixture.

[augustelalande]

Not super straight forward to gate since it's just detecting a few additional context managers. I think there's precedence for not gating when just detecting more functions, e.g., #12065

[MichaReiser]

The way this differs in my view from the numpy rule is that the NumPy rule was made more complete by including more of the deprecated methods. This PR introduces support for entire new async libraries, which extends the scope of the rule. @zanieb what's your take on this?

[augustelalande]

Ok no problem. I did the gating.