Internally used out events do not work with C observables

[rherrmannr]

Observables and internally used out events do not work together. Current tests are on blacklist:

• EventDrivenOutEvents
• RaiseEvent

[terfloth]

Possible solution:

• handle comparable to external out events and create shadow event as internal event

[rherrmannr]

Tests are running. Already fixed with https://github.com/Yakindu/statecharts/pull/3111