Since 0 in labels means that no cell was identified in that pixel, we need to
ignore 0 when matching. Otherwise we could have a situation where e.g the
cell overlaps 0.55 with 0 and 0.45 with some cell and it would end up unmatched
(`ID_coverage` would be 0 and a new track would be initialized)

If the advected cell overlaps > 10% with more than one cell at next timestep, consider
the advected cell as a split cell. Store information of which IDs the cell split to.
Also for cells at current timestep, mark cells that resulted from splits

If the cell at current timestep is overlapped > 10% by more than one advected cell,
consider it merged and store IDs of previous cells.
Also mark cells from previous timestep is they will merge at next timestep.