Coverage config incompatible with pyCharm

Since PR #432 was merged working with test coverage inside pyCharm become broken

It's related with [old pyCharm issue](https://youtrack.jetbrains.com/issue/PY-59553)

```
/PyCharm Professional Edition.app/Contents/plugins/python/helpers/coveragepy_new/coverage/inorout.py:519: CoverageWarning: Module aiohttp_sse/ was never imported. (module-not-imported)
self.warn(f"Module {pkg} was never imported.", slug="module-not-imported")
/PyCharm Professional Edition.app/Contents/plugins/python/helpers/coveragepy_new/coverage/inorout.py:519: CoverageWarning: Module tests/ was never imported. (module-not-imported)
self.warn(f"Module {pkg} was never imported.", slug="module-not-imported")
/PyCharm Professional Edition.app/Contents/plugins/python/helpers/coveragepy_new/coverage/control.py:801: CoverageWarning: No data was collected. (no-data-collected)
self._warn("No data was collected.", slug="no-data-collected")
/PycharmProjects/aiohttp-sse/.venv312/lib/python3.12/site-packages/pytest_cov/plugin.py:312: CovReportWarning: Failed to generate report: No data to report.

warnings.warn(CovReportWarning(message))
```

Waiting for pyCharm issue become closed may take some years :(
So it would be nice to move coverage settings back to coverage config