Annotate Trace.Assert/Fail with [DoesNotReturn{If}] (#89066)

Annotate Trace.Assert/Fail with [DoesNotReturn{If}] (#89066)

As with Debug.Assert/Fail, by default failures result in fail fasts.  It's possible for other trace listeners to be plugged in instead, but there's no way to model that with nullable reference types.  There's no reason Trace should be on a different plan from Debug, so this moves it to having the same annotations Debug has had for years.