consolidate pytest config in pyproject.toml (#6201)

fixes #6194

Wheel tests in this project are emitting tons of warnings like this:

> test_random_forest.py:1247
  /__w/cuml/cuml/python/cuml/cuml/tests/test_random_forest.py:1247: PytestUnknownMarkWarning: Unknown pytest.mark.memleak - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/how-to/mark.html
    @pytest.mark.memleak

I think that's because the introduction of a `pytest.ini` file in #6078 resulted in all of the `pytest` options from `pyproject.toml` being ignored.

From https://docs.pytest.org/en/stable/reference/customize.html#pytest-ini

> pytest.ini files take precedence over other files, even when empty.

I think "take precedence" there means that if `pytest` finds a `pytest.ini`, it stops searching for other configuration files.

Authors:
  - James Lamb (https://github.com/jameslamb)
  - Vyas Ramasubramani (https://github.com/vyasr)

Approvers:
  - Tim Head (https://github.com/betatim)
  - Jake Awe (https://github.com/AyodeAwe)
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: #6201

.github/CODEOWNERS

@@ -5,11 +5,9 @@ cpp/               @rapidsai/cuml-cpp-codeowners
 python/            @rapidsai/cuml-python-codeowners
 
 #cmake code owners
-**/CMakeLists.txt          @rapidsai/cuml-cmake-codeowners
-**/cmake/                  @rapidsai/cuml-cmake-codeowners
-python/cuml/pyproject.toml @rapidsai/cuml-cmake-codeowners
-build.sh                   @rapidsai/cuml-cmake-codeowners
-**/build.sh                @rapidsai/cuml-cmake-codeowners
+CMakeLists.txt @rapidsai/cuml-cmake-codeowners
+*.cmake        @rapidsai/cuml-cmake-codeowners
+**/cmake/      @rapidsai/cuml-cmake-codeowners
 
 #CI code owners
 /.github/                @rapidsai/ci-codeowners

.gitignore

@@ -68,3 +68,8 @@ cpp/Doxyfile
 # clang tooling
 compile_commands.json
 .clangd/
+
+# generally prefer 'pyproject.toml' to 'pytest.ini' for pytest options
+# ref: https://github.com/rapidsai/cuml/pull/6201
+pytest.ini
+!python/cuml/cuml/benchmark/automated/pytest.ini

python/cuml/pyproject.toml

@@ -28,6 +28,8 @@ select = [
 max_allowed_size_compressed = '1.5G'
 
 [tool.pytest.ini_options]
+addopts = "--tb=native"
+
 markers = [
   "unit: Quickest tests focused on accuracy and correctness",
   "quality: More intense tests than unit with increased runtimes",