Run benchmarks on main, render, and task thread

[TwitchBronBron]

Run benchmarks on all 3 thread types. It does it on all 3 by default. You can configure a suite so that it is not permitted to run on a specific thread, but you should only do this when it's actually incapable of running. (like a very long benchmark that would timeout, or roUrlTransfer that can't run on render).

TODO:

• handle presentation (right now the thread runs show up like variants, it's hard to correlate a test across all 3 threads. how should we handle that
• add cli flag to focus on a single thread (most of the time you probably don't care to run on multiple threads...