Handle the special variant event type code cases

[jonlamb-gh]

Need to special case the "lost" event codes:
https://github.com/FreeRTOS/FreeRTOS/blob/cfb32b4f62ed2b4e1b3f70e807438860fa49195f/FreeRTOS-Plus/Source/FreeRTOS-Plus-Trace/Include/trcKernelPort.h#L796-L830

The ObjectClassCode assumes they map consistently regardless of the context, but that only applies to Queue, Semaphore, Mutex (and maybe Task). Beyond that, it depends on the context.