Replace isort, flake8, pycln and pyupgrade by ruff. [Ruff](https://github.com/charliermarsh/ruff) is getting popular lately, and I really like the idea of having a single tool for Python lining instead of N which currently exist. Also written in Rust which is a good use case for this.

 It's supposed to have equivalent functionality, to the ones we are using. The fact that major projects are adopting it is a good sign (see list in their readme).  There are also a few extra options in their readme that look interesting and that we could enable (without having to install yet another plugin)

We won't gain much speed-wise: previously isort, flake8 (which itself is an abstraction over pycodestyle and pyflakes), pycln and pyupgrade  on all files was around 1s, and now it's 20ms. But with mypy taking 10s, it makes mostly no difference.
Still it makes the overall linting configuration easier to maintain.


If we go forward with this, I imagine a changelog is not needed? 

package:
  name: cytoolz
  version: 0.12.0
  top-level:
    - cytoolz
source:
  sha256: c105b05f85e03fbcd60244375968e62e44fe798c15a3531c922d531018d22412
  url: https://files.pythonhosted.org/packages/c1/75/e2e5cbe5309f14265d6c9ac543933a24b168416f87ae9275083be10759eb/cytoolz-0.12.0.tar.gz
requirements:
  run:
    - nose
    - toolz
about:
  home: https://github.com/pytoolz/cytoolz
  PyPI: https://pypi.org/project/cytoolz
  summary: "Cython implementation of Toolz: High performance functional utilities"
  license: BSD

package:
  name: cytoolz
  version: 0.12.0
  top-level:
    - cytoolz
source:
  sha256: c105b05f85e03fbcd60244375968e62e44fe798c15a3531c922d531018d22412
  url: https://files.pythonhosted.org/packages/c1/75/e2e5cbe5309f14265d6c9ac543933a24b168416f87ae9275083be10759eb/cytoolz-0.12.0.tar.gz
requirements:
  run:
    - nose
    - toolz
about:
  home: https://github.com/pytoolz/cytoolz
  PyPI: https://pypi.org/project/cytoolz
  summary: "Cython implementation of Toolz: High performance functional utilities"
  license: BSD
