FormatOps: slightly refactor scala.js policy #5085

Job	Run time
community-test (11, windows-latest)	3m 18s
native-image (macOS-12, default)	5m 6s
formatting	23s
community-test (11, ubuntu-latest)	1m 52s
test (11, windows-latest)	8m 52s
native-image (ubuntu-latest, default)	3m 30s
test (11, ubuntu-latest)	7m 22s
native-image (ubuntu-latest, musl)	3m 44s
test (21, windows-latest)	8m 35s
test (21, ubuntu-latest)	6m 23s
dockerize	0s
	49m 5s

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