create utility functions to model bus/ipc/os overhead between LPs
Right now various components of the Triton model use the SMALL_TS or NULL_TS values in places where we identified event transitions that did not need to consume significant time.
We can use these transitions to model bus, os, or ipc overhead, however. For now we can just use a randomized small delay for this purpose. The extra jitter here will also help to break event timing ties.
We should implement a utility function that provides this timing information and then update the affected Triton models accordingly.