Use an annotation @dynamic instead of @aspect to drive the trace management and debug view

[dvojtise]

We currently use the information added by melange in the ecore file in order to drive the trace metamodel generation and the debug view content (variable view). This information is currently an annotation named aspect. It would be more logical to have an annotation named dynamic.

However this requires some changes in Melange (see https://github.com/diverse-project/melange/issues/117)