Support SU(2) benchmarking

[dowusu-antwi]

What is happening?

Add SU(2) benchmarking to Superstaq/Supermarq QCVVB tools. E.g., see Fig. 2 in Lukin paper here:

What are the current alternatives?

N/A. Should be facilitated by #992.

Any additional context?

SU(2) is particularly well-suited to neutral atom devices. Adding this supports "write-once, target-any".

[cdbf1]

I took a look at this and I don't think the experiment in Fig 6 of that paper is quite what we want for a general fidelity characterization protocol, so instead I've implemented the protocol they have in Fig 3 which seems to work quite nicely.

We could separately look into what they do in Fig 6 as a method for characterizing phase errors.