Add script for scaling testing #1589

Job	Run time
download_test_data	3s
build (macos-latest)	3m 6s
unit_tests	3m 37s
build (ubuntu-latest)	2m 41s
test_decoder	2m 38s
spotbugs	6m 41s
test_clara	6m 19s
dependency_analysis	1m 33s
test_run-groovy	56s
test_coatjava (ubuntu-latest, eb-epc)	1m 47s
test_coatjava (ubuntu-latest, kpp)	4m 7s
test_coatjava (ubuntu-latest, eb-enc)	2m 18s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 20s
test_coatjava (ubuntu-latest, eb-ep)	1m 47s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	3m 17s
test_coatjava (ubuntu-latest, eb-eg)	1m 41s
release_build	0s
generate_documentation	1m 11s
deploy_web_pages	-1s
final	3s
	46m 4s

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