Use general type ignore for asyncio.Task

[cdce8p]

Discovered while working on python/mypy#13831

Mypy does also complain about the covariance introduced in #8781.
To reproduce a simple test case from mypy

# test.py

from asyncio import Future, wait
from typing import List

async def foo() -> None:
    f = []  # type: List[Future[None]]
    await wait(f)

mypy --no-silence-site-packages test.py

mypy/typeshed/stdlib/asyncio/tasks.pyi:273: error: Variance of TypeVar "_T_co" incompatible with variance in parent type  [type-var]

/CC: @hauntsaninja

[JelleZijlstra]

I think we just merged the mypy change that checks for this.

[AlexWaygood]

Thanks! I think this is because mypy complains about this on the master branch, but not in the release of mypy we use in CI (the check was only recently added)

[cdce8p]

Found it: python/mypy#13714

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉