By: Michael Lynch <git@mtlynch.io>
Rename relative media path API Rename mediastore.RelativeOutputPath to RelativePath and update all callers.
| Time to Start | Worker time | Duration | Time to finish | |
| Config | 2s | 12s | 12s | 14s |
| Eval | 12s | 2m38s | 2m38s | 2m50s |
| Build | 39s | 9m36s | 3m49s | 4m28s |
| Suite | 2s | 12m26s | 4m26s | 4m28s |