rename test/bisect to test/bisect_tool to avoid importing bisect from the test path when running unittests

Author: cosminbasca

graalpython/lib-python/3/test/bisect.py renamed to graalpython/lib-python/3/test/bisect_tool.py

@@ -17,6 +17,7 @@
     ./python -m test.bisect -i tests test_os
 """
 
+# TODO TRUFFLE: revert rename me back to bisect.py
 import argparse
 import datetime
 import os.path