Improve handling for parallel Scala CLI runs #9999

Job	Run time
jvm-tests-2	5m 7s
unit-tests	5m 7s
generate-linux-launcher	5m 8s
generate-macos-launcher	1s
jvm-tests-1	5m 8s
jvm-tests-3	5m 8s
jvm-tests-4	5m 8s
jvm-tests-5	5m 8s
bloop-memory-footprint	5m 8s
checks	5m 10s
docs-tests	5m 8s
format	43s
generate-linux-arm64-native-launcher	0s
generate-macos-m1-launcher	1s
generate-static-launcher	5m 7s
generate-mostly-static-launcher	5m 7s
generate-windows-launcher	4m 58s
reference-doc	2m 21s
test-hypothetical-sbt-export	26s
vc-redist	0s
native-macos-tests-1	1s
native-macos-tests-2	1s
native-macos-tests-3	1s
native-macos-m1-tests-2	1s
native-macos-m1-tests-1	1s
native-macos-m1-tests-3	1s
native-macos-m1-tests-4	1s
native-macos-m1-tests-5	1s
native-macos-tests-4	1s
native-macos-tests-5	1s
native-windows-tests-4	1s
native-windows-tests-3	1s
native-windows-tests-2	1s
native-windows-tests-1	1s
native-windows-tests-5	1s
native-mostly-static-tests-2	1s
native-mostly-static-tests-1	1s
native-mostly-static-tests-3	1s
native-mostly-static-tests-4	1s
native-mostly-static-tests-5	1s
native-static-tests-1	1s
native-static-tests-3	1s
native-static-tests-2	1s
native-static-tests-4	1s
native-static-tests-5	1s
native-linux-tests-1	1s
native-linux-tests-2	1s
native-linux-tests-3	1s
native-linux-tests-4	1s
native-linux-tests-5	1s
publish	1s
launchers	1s
Update packages	1s
Update Windows packages	1s
	1h 10m 38s

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