Selectively discretize

[tjstavenger-pnnl]

The test I've added directly calls the function we use to discretize the params. I should add a test that builds an animation that verifies it works there, too.

[tjstavenger-pnnl]

The test I've added directly calls the function we use to discretize the params. I should add a test that builds an animation that verifies it works there, too.

I added an animation test, though it isn't really automated (it doesn't assert anything). I did put a breakpoint in the __calculate_segment_params and found it to be called as expected for the cv_c_schwinger gate.