Add Automation Chain execution for Multiple Task node

For a Multiple Task node, only after the last user validating its task, the automation chain transition is executed. Which is normal.

but

We need to have the possibility to execute an automation chain even if the workflow is "running" the same node. So for a Multiple Task, each time a user is validating (even if its not the last one), we could execute an automation chain to store variables and handle business cases.