ci: have rust-cargo-test inherit from all
This help changing configuration for everything at the same time.
This was initially the case before being dropped by mistake in 0ddd5e1f5f67.
[build-system]
requires = ["setuptools", "wheel"]
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true