Ensure function abort on shutdown

[jviau]

Fixes an issue with gRPC out-of-proc durable workers where all in-flight activities and orchestrations would fail during host shutdown. The root issue is that the function invocation actually completes, but in a failed state, during host shutdown. The fix is to check for a combination of failure and host shutting down post invocation, then ensure we abort the session in this case.

resolves #2454

Pull request checklist

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[davidmrdavid]

version rev looks good