Inconsistent Benchmark and Quay Image Names

Looking at any of the build results after #344 (i.e. https://github.com/cloud-bulldozer/benchmark-wrapper/actions/runs/1221646689), we have some inconsistent names between the wrappers in our code and the wrapper images up on quay. Additionally, some wrappers are missing image repositories altogether. Here are the inconsistencies that I found:

|snafu wrapper module name|snafu wrapper tool name (`--tool`)|quay image name|
|---|---|---|
|iperf|n/a|iperf3|
|ycsb|ycsb|ycsb-server|
|fs_drift|fs-drift|fs-drift|
|dns_perf|dns_perf|No repo on quay|
|upgrade_openshift|upgrade|No repo on quay|

I can add logic into the [build_matrix.py](https://github.com/cloud-bulldozer/benchmark-wrapper/blob/master/ci/build_matrix.py) script in order to take care of this, or we can do some refactoring of our image names. What do we think?