Ability to report decision task failure after a decision timeout

[samarabbas]

Cadence state machine reports the first decision failure (timeout, failure) to history and then creates transient decisions later on. This could be a problem in debugging client issues where the first decision times out and then later client tries to report the decision failure due to actual bug. Now this failure will be dropped and it won't be written to history.
A better experience is to pass a flag down to client which can be used to either report the failure or let it drop instead of relying on the RetryCount on the decision.