Agentic AI: Rephrase AI Agent event handling "interrupt" behavior

[maff]

What should we do?

The term "interrupt" has a strong meaning in BPMN terms which does not really align with our event handling behavior option. We should therefore rename the option "Interrupt tool calls" to "Cancel tool calls" for more clarity. In addition, the description should be changed to "Behavior on completing an event sub-process" as this is more accurate.

To keep it backwards compatible, we should internally keep the constant "INTERRUPT_TOOL_CALLS".

• Change descriptions to the terms above
• Retroactively patch the changes into existing element templates

Why should we do it?

More clarity on event handling behavior, not interfering with BPMN terms. See this discussion for more context.