Sækja Python 3.13 3.13.5

Windows
- gh-135151: Avoid distributing modified pyconfig.h in the traditional installer. Extension module builds must always specify Py_GIL_DISABLED when targeting the free-threaded runtime.
Tests
- gh-135120: Add test.support.subTests().
Library
- gh-133967: Do not normalize locale name ‘C.UTF-8’ to ‘en_US.UTF-8’.
- gh-135326: Restore support of integer-like objects with __index__() in random.getrandbits().
- gh-135321: Raise a correct exception for values greater than 0x7fffffff for the BINSTRING opcode in the C implementation of pickle.
- gh-135276: Backported bugfixes in zipfile.Path from zipp 3.23. Fixed .name, .stem and other basename-based properties on Windows when working with a zipfile on disk.
- gh-134151: email: Fix TypeError in email.utils.decode_params() when sorting

RFC 2231 continuations that contain an unnumbered section.
- gh-134152: email: Fix parsing of email message ID with invalid domain.
- gh-127081: Fix libc thread safety issues with os by replacing getlogin with getlogin_r re-entrant version.
- gh-131884: Fix formatting issues in json.dump() when both indent and skipkeys are used.
Core and Builtins
- gh-135171: Roll back changes to generator and list comprehensions that went into 3.13.4 to fix gh-127682, but which involved semantic and bytecode changes not appropriate for a bugfix release.
C API
- gh-134989: Fix Py_RETURN_NONE, Py_RETURN_TRUE and Py_RETURN_FALSE macros in the limited C API 3.11 and older: don’t treat Py_None, Py_True and Py_False as immortal. Patch by Victor Stinner.
- gh-134989: Implement PyObject_DelAttr() and PyObject_DelAttrString() as macros in the limited C API 3.12 and older. Patch by Victor Stinner.