tests/basic: Split tests into working with small ints and not working.

Tests which don't work with small ints are suffixed with _intbig.py. Some
of these may still work with long long ints and need to be reclassified
later.

tests/basics/bytes_construct.py

@@ -11,9 +11,6 @@ print(bytes(bytearray(4)))
 print(bytes(array('b', [1, 2])))
 print(bytes(array('h', [0x101, 0x202])))
 
-# long ints
-print(ord(bytes([14953042807679334000 & 0xff])))
-
 # constructor value out of range
 try:
     bytes([-1])