pdal: skip test broken by GDAL 3.11

It's trying to use a plugin that no longer exists.

pkgs/by-name/pd/pdal/package.nix

···
 
     # Failure
     "pdal_app_plugin_test"
+
+    # Removed in GDAL 3.11
+    "pdal_io_gdal_writer_test"
   ];
 
   nativeCheckInputs = [