feat: report non-zero exit code if anything is different #1995

Job	Run time
java_matrix	2s
download_test_data	4s
build (ubuntu-latest)	3m 4s
build (macos-latest)	3m 39s
unit_tests (25)	2m 49s
unit_tests (21)	2m 47s
generate_documentation	1m 4s
test_clara	3m 39s
dependency_analysis	1m 7s
spotbugs	6m 54s
test_decoder	3m 3s
test_run-groovy	40s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	4m 24s
test_coatjava (ubuntu-latest, eb-epc)	1m 50s
test_coatjava (ubuntu-latest, eb-eg)	1m 52s
test_coatjava (ubuntu-latest, eb-enc)	1m 49s
test_coatjava (ubuntu-latest, eb-eftpi)	1m 55s
test_coatjava (ubuntu-latest, kpp)	3m 1s
test_coatjava (ubuntu-latest, eb-ep)	1m 56s
release_build	0s
deploy_web_pages	0s
final	2s
	45m 41s

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