python-yaml: fix build with Cython 3

Signed-off-by: krant <aleksey.vasilenko@gmail.com>

lang/python/python-yaml/patches/001-cython3.patch

@@ -0,0 +1,18 @@
+--- a/pyproject.toml
++++ b/pyproject.toml
+@@ -1,3 +1,3 @@
+ [build-system]
+-requires = ["setuptools", "wheel", "Cython<3.0"]
++requires = ["setuptools", "wheel", "Cython"]
+ build-backend = "setuptools.build_meta"
+--- a/setup.py
++++ b/setup.py
+@@ -82,7 +82,7 @@ if 'sdist' in sys.argv or os.environ.get
+     with_cython = True
+ try:
+     from Cython.Distutils.extension import Extension as _Extension
+-    from Cython.Distutils import build_ext as _build_ext
++    from Cython.Distutils.old_build_ext import old_build_ext as _build_ext
+     with_cython = True
+ except ImportError:
+     if with_cython: