python/plugins: turn on GDAL exceptions to avoid deprecation warning

[rouault]

Fixes #57344

IHMO not appropriate for backport in stable branches

[github-actions]

🪟 Windows builds ready!

Windows builds of this PR are available for testing here. Debug symbols for this build are available here.

(Built from commit c9633b7)

[m-kuhn]

This should appear as api break I guess. It will have an implication on some plugins which will be looking for guidance.

[m-kuhn]

Can you add a note to https://github.com/qgis/QGIS/blob/master/doc/api_break.dox ?

[rouault]

Can you add a note to https://github.com/qgis/QGIS/blob/master/doc/api_break.dox ?

done

[m-kuhn]

Thanks

[rouault]

CC @benoitdm-oslandia FYI, see commit b3a2ac8 where I've tried to correct a test case that you had added in 927a7c1 and that wouldn't work as expected. The OGR SQLite driver refuses to insert PointZ features in a PointZM layer, so I've just reduced the test case to creating an empty layer

[benoitdm-oslandia]

CC @benoitdm-oslandia FYI, see commit b3a2ac8 where I've tried to correct a test case that you had added in 927a7c1 and that wouldn't work as expected. The OGR SQLite driver refuses to insert PointZ features in a PointZM layer, so I've just reduced the test case to creating an empty layer

Indeed: I should have try to add a feature count test (self.assertTrue(vl.featureCount() > 2) fails) !

I was just trying to test against strange geopackages (bad extent or mismatch geometry type). I had some examples at the moment I wrote the tests but I can not find them anymore.