Ensure consistent cancellation of chained dependent jobs #4590
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the chain
canceled up the hierarchy except PARALLEL_CANCEL_WHOLE_CLUSTER is set
to a falsy value)
canceling from the root (unless there are multiple roots)
cases but whether it worked depended on the internal order in which
dependencies have been traversed
https://progress.opensuse.org/issues/108476 it expected that
cancellation only affects jobs down the chain
of nested functions calls to ensure a consistent behavior regardless of
the internal order of dependency traversal
No tests yet because I hope failing unit tests will give me a hint were to make adjustments.