os.linux: Remove latency table view and use the one from timing

os.linux: Remove latency table view and use the one from timing

The latency table is replaced by the timing's concrete table view with
secondary ID.

The SWTbot tests needed to be udpated as well. A utils method was added
to open views with secondary ids.

Change-Id: Ia71ece1f14f7f0032cef9bd219dba45d7cd1e242
Signed-off-by: Geneviève Bastien <gbastien+lttng@versatic.net>
Reviewed-on: https://git.eclipse.org/r/80963
Reviewed-by: Hudson CI
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>