Along with #35351, we should accept specifying maxAttempts as 0, indicating no retries at all. This is particularly useful with a placeholder along the lines of @Retryable(maxAttemptsString = "${limitedAttempts}") that can be externally configured to turn off retries completely.

The underlying BackOff implementations accept maxAttempts=0 already, this just needs to be relaxed in the RetryPolicy builder itself.