Area Simplify drops Z and M values

[baswein]

What is the bug or the crash?

If you run the Simplify Algo with Area(Visvalingam) the Z and M values will become null if any vertexes are removed.

Steps to reproduce the issue

1. Create a line layer with Z at 100 and M values set and enough vertices to be able to run simplify.
2. Run the simplify algo and set Simplification method to Area(Visvalingam).
3. Set the tolerance to a value that will remove at least one vertex.
4. Check that the M and Z values are now null.
   Test data:
   Area_Simplify_ZMdrop.zip

Starting layer with all Z set to 100

Simplified with some vertex's removed all Z now null or 0

Simplified with no vertex's removed all Z's still 100 (one vertex was set to 200 did the same thing without that)

Versions

<style type="text/css"> p, li { white-space: pre-wrap; } </style>

QGIS version	3.29.0-Master	QGIS code revision	ca130dd
Qt version	5.15.3
Python version	3.9.5
GDAL/OGR version	3.6.0dev-5df18be65c
PROJ version	9.1.0
EPSG Registry database version	v10.074 (2022-08-01)
GEOS version	3.10.3-CAPI-1.16.1
SQLite version	3.39.4
PDAL version	2.4.3
PostgreSQL client version	unknown
SpatiaLite version	5.0.1
QWT version	6.1.6
QScintilla2 version	2.13.1
OS version	Windows 10 Version 2009
This copy of QGIS writes debugging output.
Active Python plugins
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
otbprovider	2.12.99
processing	2.12.99
sagaprovider	2.12.99

QGIS version 3.29.0-Master QGIS code revision [ca130dd](https://github.com/qgis/QGIS/commit/ca130dd49c) Qt version 5.15.3 Python version 3.9.5 GDAL/OGR version 3.6.0dev-5df18be65c PROJ version 9.1.0 EPSG Registry database version v10.074 (2022-08-01) GEOS version 3.10.3-CAPI-1.16.1 SQLite version 3.39.4 PDAL version 2.4.3 PostgreSQL client version unknown SpatiaLite version 5.0.1 QWT version 6.1.6 QScintilla2 version 2.13.1 OS version Windows 10 Version 2009

This copy of QGIS writes debugging output.

Active Python plugins
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
otbprovider
2.12.99
processing
2.12.99
sagaprovider
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

The Distance (Douglas-Puecker) stetting does not appear to be affected but it also doesn't seem to take into account Z values in simplification.
I was excited by the prospect of being able to simplify draped lines and have them take into account the Z dimension which the Area setting does.
I did not try this on polygons.