Also fix tdf#123833 and tdf#123837.

In combined charts, now axis types are exported in the right order
(catAx[1], valAx[1], catAx[2], valAx[2]). The Y axes are exported
correctly with the correct axIDs of the chart types: the first one with
the primary axId, the second one with the secondary axId. X category
axis crosses the Y axis at the right place, all data series are attached
to the right Y axis, and the Y major grid doesn't disappear.

Note: don't export the CrossoverPosition/CrossoverValue, if the axis
is deleted and invisible, because MSO will show the secondary X axis,
even if the axis doesn't exist. The problem was the unnecessary export
of the axis with the default css::chart::ChartAxisPosition_END
CrossoverPosition value.

Change-Id: Id429e654ff0ba45b5f9db877b7c4dd6e65433408
Reviewed-on: https://gerrit.libreoffice.org/70814Reviewed-by: László Németh <nemeth@numbertext.org>
Tested-by: László Németh <nemeth@numbertext.org>