Add darc get-asset support for filtering by build/commit digest

Usage Scenario:

I have asset A from a particular build that I can lookup with get-asset. I know that same build produced asset B as well. How can I use darc to find the version of asset B from the same build?

Today, the only way I know how to do this is to lookup asset B without a filter and then search the results/output locally. This is inconvenient especially when the build in requestion exceeds the default age range. get-assets can be extremely slow in this scenario. What I would like is an option that lets me apply a filter on the build or commit digest.