Rename "one_sided_and_tree" to "one_input_and_tree"

This is a better name for this test.
Generate random IO inputs

This was a mistake: I just forgot to actually generate random inputs
(I was using the cycle number for debugging).  The omission has been
fixed.
Add "one_sided_and_tree"

This generates a large linear AND tree with all different inputs.
It's designed to be a proper test case for flo-opt.