Similar to the existing setting for temporal filtering of 2d layout
maps, this setting allows users to set a specific elevation/z range
for a layout map item. When set, map layers with support for 2d
z range filtering (currently point clouds and raster DEMs) will
be filtered to show only content within this range.
The z range can be data-defined, allowing differing z range
for different atlas or report features.
The original workaround was only supposed to apply to QList/
QVector of QVariantMaps. By replacing them all in sip we
break mapping of signals defined in c++ which are emitted
by Python code.
Fixes exceptions after running processing algorithms in Qt6
builds.
