Fails with Python3.13 freethreaded

[art049]

Using the malloc memory allocator with Python3.13 is not supported when the GIL is disabled, this raises the following error:

Fatal Python error: preconfig_init_allocator: PYTHONMALLOC: unknown allocator
Python runtime state: preinitializing

Source:
https://github.com/python/cpython/blob/1064141967a2d22c2ae9e22ae77e8c9616559947/Objects/obmalloc.c#L536-L542