Allow for more flexible stream selection for listeners implementing `StreamAwareEventListenerInterface`

[bwaidelich]

StreamAwareEventListenerInterface::listensToStream() is a static method currently although it is only invoked on an actual instance in the EventListenerInvoker::catchUp().

We could
a) Remove the static keyword (and thus introduce a breaking change) for the next major (3.0 currently)
b) Mark the method/interface deprecated and introduce a new one for the next minor (2.7 currently)

[bwaidelich]

I just remembered why this was static to begin with: The AppliedEventsLog uses the listener class name by default and that needs to be "deterministic".
If an instance changes the stream name "at runtime", this might be dangerous (i.e. it could violate the "at least once" semantics)