swev-id: sphinx-doc__sphinx-9698 — Fix property index entries for py:method :property:

[casey-brooks]

Summary

• omit parentheses in python domain index entries when a py:method directive is marked with :property:
• keep module-level method properties aligned with class properties and cover via unit + HTML regression tests
• restore RemovedInSphinx40Warning shim so bundled htmlhelp extension stays importable under pytest

Testing

• PYTHONPATH=/workspace/sphinx/.venv/lib/python3.11/site-packages:/workspace/sphinx /workspace/sphinx/.venv/bin/pytest -q (fails: tests/test_build_linkcheck.py::{test_defaults,test_anchors_ignored}, tests/test_ext_autodoc_configs.py::{test_autodoc_typehints_signature,test_autodoc_default_options}, tests/test_ext_imgconverter.py::test_ext_imgconverter, tests/test_setup_command.py::{test_build_sphinx,test_build_sphinx_multiple_builders,test_build_sphinx_with_nonascii_path,test_build_sphinx_warning_return_zero_status}, tests/test_util_i18n.py::test_format_date, tests/test_util_inspect.py::test_signature_annotations, tests/test_util_typing.py::{test_restify,test_restify_type_hints_containers,test_stringify_type_hints_containers} – matches failures on a clean checkout)
• PYTHONPATH=/workspace/sphinx/.venv/lib/python3.11/site-packages:/workspace/sphinx /workspace/sphinx/.venv/bin/pytest tests/test_domain_py.py -q (48 passed)
• /workspace/sphinx/.venv/bin/flake8 sphinx/domains/python.py tests/test_domain_py.py

Closes #89

[casey-brooks]

Test & Lint Summary

• PYTHONPATH=/workspace/sphinx/.venv/lib/python3.11/site-packages:/workspace/sphinx /workspace/sphinx/.venv/bin/pytest -q (fails: tests/test_build_linkcheck.py::{test_defaults,test_anchors_ignored}, tests/test_ext_autodoc_configs.py::{test_autodoc_typehints_signature,test_autodoc_default_options}, tests/test_ext_imgconverter.py::test_ext_imgconverter, tests/test_setup_command.py::{test_build_sphinx,test_build_sphinx_multiple_builders,test_build_sphinx_with_nonascii_path,test_build_sphinx_warning_return_zero_status}, tests/test_util_i18n.py::test_format_date, tests/test_util_inspect.py::test_signature_annotations, tests/test_util_typing.py::{test_restify,test_restify_type_hints_containers,test_stringify_type_hints_containers} – matches failures on a clean checkout)
• PYTHONPATH=/workspace/sphinx/.venv/lib/python3.11/site-packages:/workspace/sphinx /workspace/sphinx/.venv/bin/pytest tests/test_domain_py.py -q (48 passed)
• /workspace/sphinx/.venv/bin/flake8 sphinx/domains/python.py tests/test_domain_py.py

[noa-lucent]

Looks good. The python-domain change cleanly removes the superfluous parentheses for :property: methods, and the added unit/regression coverage exercises both the AST and HTML output paths. Restoring the RemovedInSphinx40Warning shim keeps htmlhelp importable under pytest.