Update baseline images for psxyz tests

[seisman]

partially address #9050

[github-actions]

Summary of changed images

This is an auto-generated report of images that have changed on the DVC remote

Status	Path
modified	test/baseline/grdview/
modified	test/baseline/grdview/gouraud.ps
modified	test/baseline/psxyz/
modified	test/baseline/psxyz/QR.ps
modified	test/baseline/psxyz/matharc.ps
modified	test/baseline/psxyz/varwedges.ps
modified	test/baseline/psxyz/vector.ps
modified	test/baseline/psxyz/wedges.ps

Image diff(s)

Details

Added images

Modified images

Path	Old	New
test/baseline/grdview/gouraud.ps
test/baseline/psxyz/QR.ps
test/baseline/psxyz/matharc.ps
test/baseline/psxyz/varwedges.ps
test/baseline/psxyz/vector.ps
test/baseline/psxyz/wedges.ps

Report last updated at commit c65ab07

[joa-quim]

I followed instructions at
https://docs.generic-mapping-tools.org/dev/devdocs/contributing.html#updating-reference-plots-for-tests
why didn't work fully. Frankly, I have no more patience for DVC.