MINOR: tevt/stream/stconn: Report termination events for stream and sc

MINOR: tevt/stream/stconn: Report termination events for stream and sc

In this patch, events for the stream location are reported. These events are
first reported on the corresponding stream-connector. So front events on scf
and back event on scb. Then all events are both merged in the stream. But
only 4 events are saved on the stream.

Several internal events are for now grouped with the type
"tevt_type_intercepted". More events will be added to have a better
resolution. But at least the place to report these events are identified.

For now, when a event is reported on a SC, it is also reported on the stream
and vice versa.