Add message field to lastRetry for conditional retries

[pjo256]

Summary

In https://argoproj.github.io/argo-workflows/retries/#conditional-retries, lastRetry cannot access workflow error/failure messages such as Pod was terminated due to imminent node shutdown. This request is for adding a message on lastRetry containing this error message.

Use Cases

In #9880, we captured preemptions by setting OnTransientError and TRANSIENT_ERROR_PATTERN. However, we would also like to retry OnError. Using conditional retries, we cannot do both since lastRetry does not include a message field - e.g.

    retryStrategy:
        limit: "3"
        expression: "lastRetry.status == 'Error' || lastRetry.message.contains('imminent node shutdown')"

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Message from the maintainers:

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[aarushisoni]

HI! I would like to work on this issue.

[terrytangyuan]

Please go ahead and submit a PR if you'd like to contribute.