[Python 3.14] Update test collection exclusions for incompatible plugins

[Exudev]

Currently, running pytest tests on Python 3.14 fails during the collection phase with several ModuleNotFoundError and ImportError exceptions. While some exclusions exist in tests/conftest.py, several other plugins need to be added to collect_ignore when running on 3.14 to ensure the core test suite remains healthy and runnable on the latest Python versions.

Identified failing collection items on 3.14:

• tests/integrations/pandera/test_pandera_data_quality.py
• tests/plugins/test_dlt_extensions.py
• tests/plugins/test_h_diskcache.py
• tests/plugins/test_h_pyarrow.py
• tests/plugins/test_h_schema.py
• tests/plugins/test_h_tqdm.py
• tests/plugins/test_matplotlib_extensions.py
• tests/plugins/test_pandas_extensions.py
• tests/plugins/test_pydantic_extensions.py
• tests/plugins/test_sklearn_plot_extensions.py

These should be added to the collect_ignore list in tests/conftest.py for Python >= 3.14.

I have submitted a PR to address this: #1587.

It stabilizes the test suite collection on Python 3.14 by excluding currently incompatible plugins and resolves the noisy configuration warnings we identified.