Changes

ros2: remove handle and host ID view tree columns

The handles (memory addresses) are meant to be an internal-only ID, and
there is no real value in showing the host ID. Therefore, do not display
them. They can be easily retrieved from the trace events if needed
anyway.

Change-Id: If1bca8c02e31f1e045173188affb5aa8a5ccb995
Signed-off-by: Christophe Bedard <bedard.christophe@gmail.com>
Signed-off-by: Christophe Bedard <christophe.bedard@apex.ai>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/203907
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>