feat: fix workflow hangs during executeDAGTask. Fixes #6557

[smile-luobin]

Signed-off-by: smile-luobin [email protected]

Fixes #6557: workflow hangs during executeDAGTask.

If a DAGTask node type is retry and its last children is completed, it will be completed after woc.executeTemplate, so need to runOnExitNode to genereate its exitNode.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If this is a mentoring request, please provide an update here. Thank you for your contributions.

[smile-luobin]

This needs a test before it can be approved and merged.

done.

[sarabala1979]

@alexec can you quickly take a look and approve it?