Rule request

Description

On the wave of deprecation rules, here's another idea. The linter could check if the config is following the best practices:

1. xfail_strict = True (per https://pganssle-talks.github.io/xfail-lightning/)
2. junit_family = xunit2 (makes pytest's warnings go away)
3. addopts args on separate lines (makes it easier to annotate the purpose with comments, ref https://github.com/ansible/pylibssh/blob/a2453ed/pytest.ini#L2-L16)
4. filterwarnings should have error on the first line (rest of the lines could be legit temporary ignores)
5. -ra in addopts
6. --durations in addopts
7. minversion should be set
8. testpaths or pyargs should be specified
9. norecursedirs present

Rationale

The default pytest config is not strict enough.

NB: since pytest 6.0.0, the options can also reside in pyproject.toml. Docs