Summary of the changes

• The VS-Platform queue is load-balanced across all the VS-PlatformX queues, so by moving to it we can:

1. Mitigate the chance that we're in a full queue for now (because even if we get unlucky once, the next time should probably be fine).
2. Set us up to take advantage of future improvements to the queuing mechanism that may do things like detect which lab has lower utilization for our specific resources etc.

CC @bradselw