feat: report non-zero exit code if anything is different #2009

Job	Run time
download_test_data	5s
build (ubuntu-latest)	2m 40s
build (macos-latest)	3m 31s
java_matrix	3s
unit_tests (21)	2m 45s
unit_tests (25)	2m 53s
generate_documentation	1m 6s
spotbugs	7m 3s
test_run-groovy	36s
test_clara	3m 43s
test_decoder	2m 24s
dependency_analysis	1m 28s
test_coatjava (ubuntu-latest, kpp)	2m 51s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 15s
test_coatjava (ubuntu-latest, eb-epc)	1m 50s
test_coatjava (ubuntu-latest, eb-enc)	1m 58s
test_coatjava (ubuntu-latest, eb-eg)	2m 0s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	3m 57s
test_coatjava (ubuntu-latest, eb-ep)	1m 56s
release_build	0s
deploy_web_pages	0s
final	3s
	45m 7s

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