gh-106869: Use new PyMemberDef constant names (#106871)

gh-106869: Use new PyMemberDef constant names (#106871)

* Remove '#include "structmember.h"'.
* If needed, add <stddef.h> to get offsetof() function.
* Update Parser/asdl_c.py to regenerate Python/Python-ast.c.
* Replace:

  * T_SHORT => Py_T_SHORT
  * T_INT => Py_T_INT
  * T_LONG => Py_T_LONG
  * T_FLOAT => Py_T_FLOAT
  * T_DOUBLE => Py_T_DOUBLE
  * T_STRING => Py_T_STRING
  * T_OBJECT => _Py_T_OBJECT
  * T_CHAR => Py_T_CHAR
  * T_BYTE => Py_T_BYTE
  * T_UBYTE => Py_T_UBYTE
  * T_USHORT => Py_T_USHORT
  * T_UINT => Py_T_UINT
  * T_ULONG => Py_T_ULONG
  * T_STRING_INPLACE => Py_T_STRING_INPLACE
  * T_BOOL => Py_T_BOOL
  * T_OBJECT_EX => Py_T_OBJECT_EX
  * T_LONGLONG => Py_T_LONGLONG
  * T_ULONGLONG => Py_T_ULONGLONG
  * T_PYSSIZET => Py_T_PYSSIZET
  * T_NONE => _Py_T_NONE
  * READONLY => Py_READONLY
  * PY_AUDIT_READ => Py_AUDIT_READ
  * READ_RESTRICTED => Py_AUDIT_READ
  * PY_WRITE_RESTRICTED => _Py_WRITE_RESTRICTED
  * RESTRICTED => (READ_RESTRICTED | _Py_WRITE_RESTRICTED)