Progress on adding some benchmarks to benchpark

[august-knox]

Just checking in on some of my progress. I changed quicksilver to run on multiple nodes, and created an implementation of the ior benchmark (not too sure about the FOMs though). I also added remhos, although it is unable to run on the LLNL-Tioga-HPECray-zen3-MI250X-Slingshot system configuration due to issues with the external mvapich package. This seems like a known issue though.