Remove separate 3.11 CI now deps support 3.11 (#3446)

* Remove separate 3.11 CI now deps support 3.11

- We can run everything now like all other stable versions of Python
- test in a 3.11 vent: `/tmp/tb/bin/tox -e py311,ci-py311`

```
  py311: OK (28.99=setup[7.90]+cmd[5.29,0.66,6.94,6.08,1.89,0.24] seconds)
  ci-py311: OK (30.33=setup[3.20]+cmd[3.66,0.31,17.43,4.60,0.90,0.23] seconds)
  congratulations :) (59.35 seconds)
```

* Add to CHANGES.md

* Add fuzz run in 3.11