Avoid pickling of footprint polygons.

Signed-off-by: danschef <daniel.scheffler@gfz-potsdam.de>
3 jobs for enhancement/reduce_memory_load in 3 minutes and 58 seconds (queued for 6 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_arosics #93704

00:02:36

85.0%
passed test_styles #93705

00:00:29

passed test_urls #93706

00:00:52