Warn when tool dynamic fields are not listed

[StantonMatt]

Closes #4523.

This adds a warning for pyproject configurations where a field is configured under tool.setuptools.dynamic but is not listed in project.dynamic, so the directive would otherwise be silently ignored.

I kept the existing entry-points behavior intact: tool.setuptools.dynamic.entry-points is still considered used when scripts or gui-scripts are dynamic, since those are expanded from the entry-points file.

Validation:

• uv run --extra test --extra cover python -m pytest setuptools/tests/config/test_pyprojecttoml_dynamic_deps.py setuptools/tests/config/test_apply_pyprojecttoml.py::TestPresetField setuptools/tests/config/test_pyprojecttoml.py -q
• uv run --extra check ruff check setuptools/config/pyprojecttoml.py setuptools/tests/config/test_pyprojecttoml_dynamic_deps.py setuptools/tests/config/test_pyprojecttoml.py
• git diff --check
• review-fix-loop clean after fixing the entry-points review finding