Summary
This PR resolves the deprecation warnings in test_checkers.py caused by the usage of pkg_resources, which has been deprecated in favor of importlib.metadata and importlib.resources.

Changes Introduced

• Replaced pkg_resources with importlib.metadata and importlib.resources for improved compatibility.
• Used conditional imports to ensure support for older Python versions (<3.10 for metadata and <3.9 for resources).
• Retained pkgutil.extend_path for namespace package handling while aligning with PEP 420.

Checklist

• Code follows the project's coding standards.
• Tests have been run to verify the changes.
• No new warnings appear during test execution.

Steps to Reproduce & Test

Run the following command:

LONG_TESTS=1 pytest test/test_checkers.py

• Ensured that no deprecation warnings related to pkg_resources appear.
• Verified that all tests pass successfully.

Related Issues
Fixes #4686

Additional Notes
These changes ensure compatibility with modern Python versions while maintaining backward compatibility. 🚀