fix: reduce EVIO branch transversing in decoding, cleanup #2580

Job	Run time
java_matrix	3s
download_test_data	4s
build (ubuntu-latest)	3m 0s
build (macos-latest)	2m 49s
unit_tests (25)	3m 6s
unit_tests (21)	3m 38s
test_clara	3m 38s
spotbugs	6m 37s
test_run-groovy	45s
test_decoder	2m 18s
test_coatjava (ubuntu-latest, eb-enc)	2m 21s
test_coatjava (ubuntu-latest, eb-ep)	2m 13s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 16s
test_coatjava (ubuntu-latest, eb-epc)	2m 16s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	2m 52s
test_coatjava (ubuntu-latest, kpp)	3m 44s
test_coatjava (ubuntu-latest, eb-eg)	2m 41s
release_build	0s
generate_documentation	1m 8s
deploy_web_pages	0s
final	3s
	45m 32s

Provide feedback