Allow to abort testbench run and trigger cluster clean up

[Zelldon]

Recently we had some issues with our INT stage and we had 64 broken testbench runs. In order to restart them I had to cancel all instances and delete ALL CLUSTERS FROM CONSOLE BY HAND. There must be a better way.

One solution I can think of is to have a message catch event, which can receive a message and delete all the related clusters. It will complete the instance, which will then complete the root etc.

[pihme]

@npepinpe yesterday we talked about bringing some testbench issues to the front of the queue. This would be a good candidate, in my mind.

[npepinpe]

Haha, I did this yesterday, but I deleted the generations which was a bit faster. Does Testbench actually know which generations it "owns"? 🤔

[Zelldon]

This is a variable in the process instance