Make StepTriggerAttemptEvent Cancellable

[Kimpes]

Description

While working on an entity that should activate when being walked over, I found out that without some middleman system, the StepTriggerComponent doesn't actually trigger on step, which feels unintuitive and made me have to create a system just to continue the stepTriggerAttemptEvent. As far as I know, most other events are continued by default unless cancelled and I think it makes sense to update StepTriggerAttemptEvent to act similarly

[gradientvera]

@PJB3005