save images as artifact #192

Job	Run time
buster / build	4m 22s
bullseye / build	3m 44s
bullseye / test (pi, run_installation_tests.sh)	6m 14s
bullseye / test (pi, run_installation_tests2.sh)	4m 28s
bullseye / test (pi, run_installation_tests3.sh)	7m 38s
bullseye / test (hans, run_installation_tests.sh)	1m 2s
bullseye / test (hans, run_installation_tests2.sh)	1m 2s
bullseye / test (hans, run_installation_tests3.sh)	1m 2s
buster / test (pi, run_installation_tests.sh)	6m 11s
buster / test (pi, run_installation_tests2.sh)	6m 35s
buster / test (pi, run_installation_tests3.sh)	14m 36s
buster / test (hans, run_installation_tests.sh)	57s
buster / test (hans, run_installation_tests2.sh)	1m 26s
buster / test (hans, run_installation_tests3.sh)	1m 25s
bullseye / cleanup	5s
buster / cleanup	2s
	1h 0m 49s

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