pytest - only error on warnings from within libqtile

- Changes pytests warning filter (-W flag) to only error upon warnings
  that arise within libqtile. If they arise within our deps then we
  shouldn't error out.
- Moves the warning filter config from the command line (in tox.ini) to
  the configuration in setup.cfg
- re-instate warning filter for py310, which was temporarily disables
  due to an error in pygobject. It seems to only affect -W error
  globally on all warnings
- migrates pytest config from setup.cfg to pyproject.toml per their docs

pyproject.toml

@@ -1,3 +1,10 @@
 [tool.black]
 line-length = 98
 exclude = 'libqtile/_ffi.*\.py|libqtile/backend/x11/_ffi.*\.py|test/configs/syntaxerr.py'
+
+[tool.pytest.ini_options]
+python_files = "test_*.py"
+testpaths = ["test"]
+filterwarnings = [
+    "error:::libqtile",
+]

setup.cfg

@@ -99,11 +99,6 @@ ban-relative-imports = true
 ignore = E203,W503,E704,E123,E226,E121,E24,E126,W504,N818,E501
 enable-extensions = G
 
-[tool:pytest]
-python_files = test_*.py
-testpaths = test
-addopts = --verbose
-
 [check-manifest]
 ignore =
     stubs**

tox.ini

@@ -47,10 +47,9 @@ commands =
     pip install pywlroots>=0.16.1,<0.17.0
     pip install --no-build-isolation .
     {toxinidir}/scripts/ffibuild
-    # py310 currently fails with -W error, see: https://gitlab.gnome.org/GNOME/pygobject/-/issues/476
     # pypy3 is very slow when running coverage reports so we skip it
-    pypy3: python3 -m pytest -W error --backend=x11 --backend=wayland {posargs}
-    py39: coverage run -m pytest -W error --backend=x11 --backend=wayland {posargs}
+    pypy3: python3 -m pytest --backend=x11 --backend=wayland {posargs}
+    py39: coverage run -m pytest --backend=x11 --backend=wayland {posargs}
     py3{10,11}: coverage run -m pytest --backend=x11 --backend=wayland {posargs}
 
     # Coverage runs tests in parallel so we need to combine results into a single file
@@ -114,7 +113,6 @@ commands =
     # also run the tests that require mypy
     pip install --no-build-isolation .
     {toxinidir}/scripts/ffibuild
-# py310 currently fails with -W error, see: https://gitlab.gnome.org/GNOME/pygobject/-/issues/476
     python3 -m pytest -- test/test_check.py test/test_migrate.py
 
 [testenv:docs]