timing: Introduce new segment store for slightly out of order datasets

timing: Introduce new segment store for slightly out of order datasets

The LazyArrayListStore is like an array list store but will only sort
when a read operation is received.

This structures are faster for handling segments that are out
of order.

Bug 500591

Change-Id: I466cc288dd42b6a6a002d0704a00e8ec06b7188b
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/79877
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Reviewed-by: Hudson CI