Add back support for warn_unused_configs

[ilevkivskyi]

Fixes #7998

This was disabled in incremental mode (i.e. almost always, since this is now the default), because we didn't clone options for suppressed dependencies, but now because we are doing this (for the purpose of fixing other issues), there is no reason to keep this disabled (IMO this is a nice feature to keep your config clean).

Few more things here:

• I moved the logic inside build.build(), first it is wrong to show this warning in case of blocking errors (since we may not processed all files yet), second it is easier to test.
• I am now using more standard message formatting path: note: ...
• I am updating couple comments I forgot to update in previous PRs (sorry)

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

psycopg (https://github.com/psycopg/psycopg)
- Warning: unused section(s) in pyproject.toml: module = ['polib', 'scrap.*']
+ pyproject.toml: note: unused section(s): module = ['polib', 'scrap.*']

mongo-python-driver (https://github.com/mongodb/mongo-python-driver)
- Warning: unused section(s) in pyproject.toml: module = ['test.*']
+ pyproject.toml: note: unused section(s): module = ['test.*']

cibuildwheel (https://github.com/pypa/cibuildwheel)
- Warning: unused section(s) in pyproject.toml: module = ['importlib_resources', 'setuptools._distutils', 'setuptools._distutils.util']
+ pyproject.toml: note: unused section(s): module = ['importlib_resources', 'setuptools._distutils', 'setuptools._distutils.util']

core (https://github.com/home-assistant/core)
- Warning: unused section(s) in mypy.ini: [mypy-tests.*]
+ mypy.ini: note: unused section(s): [mypy-tests.*]

more-itertools (https://github.com/more-itertools/more-itertools)
- Warning: unused section(s) in setup.cfg: [mypy-tests.*]
+ setup.cfg: note: unused section(s): [mypy-tests.*]

sphinx (https://github.com/sphinx-doc/sphinx)
- Warning: unused section(s) in pyproject.toml: module = ['pyximport', 'tests.test_config.test_config', 'tests.test_directives.test_directive_other', 'tests.test_domains.test_domain_c', 'tests.test_domains.test_domain_cpp', 'tests.test_domains.test_domain_js', 'tests.test_domains.test_domain_py', 'tests.test_domains.test_domain_py_fields', 'tests.test_domains.test_domain_py_pyfunction', 'tests.test_domains.test_domain_py_pyobject', 'tests.test_domains.test_domain_std', 'tests.test_environment.test_environment_toctree', 'tests.test_ext_autodoc.test_ext_autodoc', 'tests.test_ext_autodoc.test_ext_autodoc_mock', 'tests.test_ext_autosummary.test_ext_autosummary', 'tests.test_ext_intersphinx.test_ext_intersphinx', 'tests.test_ext_napoleon.test_ext_napoleon_docstring', 'tests.test_extensions.test_ext_apidoc', 'tests.test_extensions.test_ext_inheritance_diagram', 'tests.test_search', 'tests.test_util.test_util_inspect', 'tests.test_util.test_util_nodes', 'tests.test_util.test_util_typing', 'tests.test_util.typing_test_data']
+ pyproject.toml: note: unused section(s): module = ['pyximport', 'tests.test_config.test_config', 'tests.test_directives.test_directive_other', 'tests.test_domains.test_domain_c', 'tests.test_domains.test_domain_cpp', 'tests.test_domains.test_domain_js', 'tests.test_domains.test_domain_py', 'tests.test_domains.test_domain_py_fields', 'tests.test_domains.test_domain_py_pyfunction', 'tests.test_domains.test_domain_py_pyobject', 'tests.test_domains.test_domain_std', 'tests.test_environment.test_environment_toctree', 'tests.test_ext_autodoc.test_ext_autodoc', 'tests.test_ext_autodoc.test_ext_autodoc_mock', 'tests.test_ext_autosummary.test_ext_autosummary', 'tests.test_ext_intersphinx.test_ext_intersphinx', 'tests.test_ext_napoleon.test_ext_napoleon_docstring', 'tests.test_extensions.test_ext_apidoc', 'tests.test_extensions.test_ext_inheritance_diagram', 'tests.test_search', 'tests.test_util.test_util_inspect', 'tests.test_util.test_util_nodes', 'tests.test_util.test_util_typing', 'tests.test_util.typing_test_data']

sympy (https://github.com/sympy/sympy)
- Warning: unused section(s) in pyproject.toml: module = ['gmpy.*', 'pydy.*', 'python-sat.*']
+ pyproject.toml: note: unused section(s): module = ['gmpy.*', 'pydy.*', 'python-sat.*']

svcs (https://github.com/hynek/svcs)
- Warning: unused section(s) in pyproject.toml: module = ['conftest', 'health_check_pyramid', 'pytest.*']
+ pyproject.toml: note: unused section(s): module = ['conftest', 'health_check_pyramid', 'pytest.*']

downforeveryone (https://github.com/rpdelaney/downforeveryone)
- Warning: unused section(s) in pyproject.toml: module = ['.venv.*']
+ pyproject.toml: note: unused section(s): module = ['.venv.*']

dd-trace-py (https://github.com/DataDog/dd-trace-py)
- Warning: unused section(s) in mypy.ini: [mypy-tests.profiling.collector.pprof_3_pb2], [mypy-tests.profiling.collector.pprof_312_pb2], [mypy-tests.profiling.collector.pprof_319_pb2], [mypy-tests.profiling.collector.pprof_421_pb2]
+ mypy.ini: note: unused section(s): [mypy-tests.profiling.collector.pprof_3_pb2], [mypy-tests.profiling.collector.pprof_312_pb2], [mypy-tests.profiling.collector.pprof_319_pb2], [mypy-tests.profiling.collector.pprof_421_pb2]

pylint (https://github.com/pycqa/pylint)
- Warning: unused section(s) in pyproject.toml: module = ['colorama', 'contributors_txt', 'coverage', 'git.*', 'mccabe', 'pytest_benchmark.*', 'sphinx.*']
+ pyproject.toml: note: unused section(s): module = ['colorama', 'contributors_txt', 'coverage', 'git.*', 'mccabe', 'pytest_benchmark.*', 'sphinx.*']

dulwich (https://github.com/dulwich/dulwich)
- Warning: unused section(s) in pyproject.toml: module = ['atheris', 'fastimport.*']
+ pyproject.toml: note: unused section(s): module = ['atheris', 'fastimport.*']

black (https://github.com/psf/black)
- Warning: unused section(s) in pyproject.toml: module = ['tests.data.*']
+ pyproject.toml: note: unused section(s): module = ['tests.data.*']

pyodide (https://github.com/pyodide/pyodide)
- Warning: unused section(s) in pyproject.toml: module = ['PIL.*', 'docutils.parsers.rst', 'loky', 'matplotlib.*', 'pytest_pyodide', 'pytest_pyodide.runner', 'pytest_pyodide.utils', 'termcolor', 'test', 'tomli']
+ pyproject.toml: note: unused section(s): module = ['PIL.*', 'docutils.parsers.rst', 'loky', 'matplotlib.*', 'pytest_pyodide', 'pytest_pyodide.runner', 'pytest_pyodide.utils', 'termcolor', 'test', 'tomli']

packaging (https://github.com/pypa/packaging)
- Warning: unused section(s) in pyproject.toml: module = ['pkg_resources', 'pretend', 'progress.*']
+ pyproject.toml: note: unused section(s): module = ['pkg_resources', 'pretend', 'progress.*']

rotki (https://github.com/rotki/rotki)
- Warning: unused section(s) in pyproject.toml: module = ['rotkehlchen.tests.api.test_aave', 'rotkehlchen.tests.api.test_balancer', 'rotkehlchen.tests.api.test_compound', 'rotkehlchen.tests.api.test_defi', 'rotkehlchen.tests.api.test_pickle', 'rotkehlchen.tests.api.test_trades', 'rotkehlchen.tests.api.test_yearn_vaults']
+ pyproject.toml: note: unused section(s): module = ['rotkehlchen.tests.api.test_aave', 'rotkehlchen.tests.api.test_balancer', 'rotkehlchen.tests.api.test_compound', 'rotkehlchen.tests.api.test_defi', 'rotkehlchen.tests.api.test_pickle', 'rotkehlchen.tests.api.test_trades', 'rotkehlchen.tests.api.test_yearn_vaults']

static-frame (https://github.com/static-frame/static-frame)
- Warning: unused section(s) in pyproject.toml: module = ['arraymap', 'doc.*', 'setuptools', 'sphinx.*', 'sphinx_rtd_theme', 'tables']
+ pyproject.toml: note: unused section(s): module = ['arraymap', 'doc.*', 'setuptools', 'sphinx.*', 'sphinx_rtd_theme', 'tables']

artigraph (https://github.com/artigraph/artigraph)
- Warning: unused section(s) in pyproject.toml: module = ['sh']
+ pyproject.toml: note: unused section(s): module = ['sh']

xarray (https://github.com/pydata/xarray)
- Warning: unused section(s) in pyproject.toml: module = ['affine.*', 'cloudpickle.*', 'netcdftime.*', 'setuptools']
+ pyproject.toml: note: unused section(s): module = ['affine.*', 'cloudpickle.*', 'netcdftime.*', 'setuptools']

bokeh (https://github.com/bokeh/bokeh)
- Warning: unused section(s) in pyproject.toml: module = ['tests.*', 'tests.codebase.*', 'tests.support.defaults', 'tests.test_bokehjs', 'tests.test_cross', 'tests.test_defaults', 'tests.test_examples', 'tests.unit.bokeh.document.test_callbacks__document', 'tests.unit.bokeh.embed.test_standalone', 'tests.unit.bokeh.test_layouts__typing', 'tests.unit.bokeh.test_typing']
+ pyproject.toml: note: unused section(s): module = ['tests.*', 'tests.codebase.*', 'tests.support.defaults', 'tests.test_bokehjs', 'tests.test_cross', 'tests.test_defaults', 'tests.test_examples', 'tests.unit.bokeh.document.test_callbacks__document', 'tests.unit.bokeh.embed.test_standalone', 'tests.unit.bokeh.test_layouts__typing', 'tests.unit.bokeh.test_typing']

boostedblob (https://github.com/hauntsaninja/boostedblob)
- Warning: unused section(s) in pyproject.toml: module = ['tests.*', 'xmltodict.*']
+ pyproject.toml: note: unused section(s): module = ['tests.*', 'xmltodict.*']

twine (https://github.com/pypa/twine)
- Warning: unused section(s) in mypy.ini: [mypy-tests.*]
+ mypy.ini: note: unused section(s): [mypy-tests.*]

isort (https://github.com/pycqa/isort)
- Warning: unused section(s) in pyproject.toml: module = ['importlib_metadata.*', 'tests.*']
+ pyproject.toml: note: unused section(s): module = ['importlib_metadata.*', 'tests.*']

nox (https://github.com/wntrblm/nox)
- Warning: unused section(s) in pyproject.toml: module = ['tox.*']
+ pyproject.toml: note: unused section(s): module = ['tox.*']