Relaxer: create a compiler pass to insert DUT assignments for all pins after every step() call

[Nikil-Shyamsunder]

[ngernest]

@Nikil-Shyamsunder Just wanted to double check that this issue is obsolete since it's gonna be replaced by the combinational dependency analysis in #121 / what we discussed today, right?

[ekiwi]

It probably isn't, since we will be doing dynamically, what this issues tries to address statically.