TST: disable tests compiling Cython code on Python 3.12

Cython generated code does not compile with Python 3.12. This cab be
revisited once the next beta version of Cython 3.0 is released.

Fixes #337.

Author: dnicolodi

tests/test_editable.py

@@ -58,6 +58,7 @@ def test_collect(package_complex):
     assert tree['complex']['more']['__init__.py'] == os.path.join(root, 'complex', 'more', '__init__.py')
 
 
+@pytest.mark.skipif(sys.version_info >= (3, 12), reason='Cython generated code does not compile on Python 3.12')
 def test_mesonpy_meta_finder(package_complex, tmp_build_path):
     # build a package in a temporary directory
     mesonpy.Project(package_complex, tmp_build_path)

tests/test_wheel.py

@@ -51,6 +51,7 @@ def wheel_filename(artifact):
     return artifact.filename.split(os.sep)[-1]
 
 
+@pytest.mark.skipif(sys.version_info >= (3, 12), reason='Cython generated code does not compile on Python 3.12')
 def test_scipy_like(wheel_scipy_like):
     # This test is meant to exercise features commonly needed by a regular
     # Python package for scientific computing or data science: