Move 3.11 tests to install aiohttp without C extensions (#3258)

* Move 311 tests to install aiohttp without C extensions

- Configure tox to install aiohttp without extensions
  - i.e. use `AIOHTTP_NO_EXTENSIONS=1` for pip install
  - This allows us to reenable blackd tests that use aiohttp testing helpers etc.
- Had to ignore `cgi` module deprecation warning
  - Filed issue for aiohttp to fix: https://github.com/aio-libs/aiohttp/issues/6905



Test:
- `/tmp/tb/bin/tox -e 311`

* Fix formatting + linting

* Add latest aiohttp for loop fix + Try to exempt deprecation warning but failed - will ask for help

* Remove unnecessary warning ignore

Co-authored-by: Cooper Ry Lees <me@wcooperlees.com>
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>