Build Testing Infrastructure for capturing race conditions.

Create a testing infrastructure that supports running builds of various solutions in multithreaded mode and collecting detailed debug data for diagnosing race conditions.
The infrastructure should:
- [ ] Provide mechanisms to capture and store debug information from PerfStar
- [ ] Allow adding multiple projects of varying types and sizes to run builds on them

We _may_ be able to make use of existing VS perf testing infra, in addition to building our own.