Added support for acquisition of data from acquire_decimated

[kjwcoo]

Sweep framework for QICK now supports data acquisition from acquire_decimated.

I think I missed something

[marcosfrenkel]

2 Things:

• You have a big assumption here that there is only a single DecimatedVariable in the QICK program, this is not specified nor enforced in the code. I am scared people will try to try to have multiple of them in the same program and the data will get scrambled up.
• Could we try having DecimatedVariable be a child class of ComplexQICKData and remove any mention of DecimatedVariable in in the ComplexQICKData section of that elif section (keep all the logic for each type of dataspec on their own section).