ss: add 2D iterator queries to the SS API

ss: add 2D iterator queries to the SS API

This patch adds 2D iterator queries to the ITmfStateSystem API,
which lazily returns intervals from a list of their quarks,
that intersect (a time range or a list of timestamps).

Change-Id: I52d510a1c6e5d24faa2d5d5466112c70d795b39a
Signed-off-by: Loïc Prieur-Drevon <loic.prieurdrevon@gmail.com>
Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>
Reviewed-on: https://git.eclipse.org/r/85962
Reviewed-by: Hudson CI
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>