gh-112087: Make list.sort to be thread-safe for PEP 703.

[corona10]

• Issue: Make list objects thread-safe in --disable-gil builds #112087

[corona10]

• No resizing in here
• QSBR was already applied:

  cpython/Objects/listobject.c

  Lines 2854 to 2861 in 17d31bf

  	#ifdef Py_GIL_DISABLED
  	bool use_qsbr = _PyObject_GC_IS_SHARED(self);
  	#else
  	bool use_qsbr = false;
  	#endif
  	free_list_items(final_ob_item, use_qsbr);
  	}
  	return Py_XNewRef(result);