tests: Move aiohttp under toxgen

[sentrivana]

Depends on #4323

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
23556	1	23555	5870

View the top 1 failed test(s) by shortest run time

tests.test_utils test_get_current_thread_meta_main_thread

Stack Traces | 0.007s run time

tests/test_utils.py:901: in test_get_current_thread_meta_main_thread
    thread.join()
.../hostedtoolcache/Python/3.10.17............/x64/lib/python3.10/threading.py:1092: in join
    if self is current_thread():
.../hostedtoolcache/Python/3.10.17............/x64/lib/python3.10/unittest/mock.py:1114: in __call__
    return self._mock_call(*args, **kwargs)
.../hostedtoolcache/Python/3.10.17............/x64/lib/python3.10/unittest/mock.py:1118: in _mock_call
    return self._execute_mock_call(*args, **kwargs)
.../hostedtoolcache/Python/3.10.17............/x64/lib/python3.10/unittest/mock.py:1175: in _execute_mock_call
    result = next(effect)
E   StopIteration

The above exception was the direct cause of the following exception:
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/runner.py:341: in from_call
    result: TResult | None = func()
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/runner.py:242: in <lambda>
    lambda: runtest_hook(item=item, **kwds), when=when, reraise=reraise
.tox/py3.10-gevent/lib/python3.10.../site-packages/pluggy/_hooks.py:513: in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
.tox/py3.10-gevent/lib/python3.10.../site-packages/pluggy/_manager.py:120: in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/threadexception.py:92: in pytest_runtest_call
    yield from thread_exception_runtest_hook()
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/threadexception.py:68: in thread_exception_runtest_hook
    yield
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/unraisableexception.py:95: in pytest_runtest_call
    yield from unraisable_exception_runtest_hook()
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/unraisableexception.py:70: in unraisable_exception_runtest_hook
    yield
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/logging.py:846: in pytest_runtest_call
    yield from self._runtest_for(item, "call")
.tox/py3.10-gevent/lib/python3.10....../site-packages/_pytest/logging.py:829: in _runtest_for
    yield
.tox/py3.10-gevent/lib/python3.10.../site-packages/_pytest/capture.py:898: in pytest_runtest_call
    return (yield)
E   RuntimeError: generator raised StopIteration

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[antonpirker]

as the tests are passing, I think this is good.