fix flake8 errors due to new pypi dependency/rule updates

[imatiach-msft]

Fix new flake8 errors that started to appear in gated builds after new versions of flake8 helper packages were released with new rules.
Specifically, I believe these are from flake8-bugbear and flake8-pytest-style updates.
Also temporarily pin scikit-learn<=1.4.2 due to issue with econml and scikit-learn in tests when validating ExplanationDashboard visualization from raiwidgets package.

Copilot summary:

This pull request primarily involves syntax modifications across several Python test files. The most significant changes include the addition of a specific error code to a BaseException in gpu_kmeans.py, and the removal of parentheses from several pytest decorators in conftest.py and test_notebooks.py.

Here are the key changes:

Syntax modifications:

• python/interpret_community/common/gpu_kmeans.py: Added a specific error code to the BaseException to adhere to linting rules.
• tests/conftest.py: Removed parentheses from the pytest.fixture decorator, which is a more Pythonic style.
• tests/test_notebooks.py: Removed parentheses from the pytest.mark.notebooks decorator in multiple test methods. This change was made consistently across several methods to maintain a uniform coding style. [1] [2] [3] [4] [5] [6] [7]