PolicyOps: add `decideNewlinesOnlyBeforeToken` #4623

Job	Run time
formatting	19s
native-image (macOS-12, default)	4m 31s
test (11, windows-latest)	9m 2s
native-image (ubuntu-latest, default)	3m 15s
test (11, ubuntu-latest)	7m 4s
native-image (ubuntu-latest, musl)	3m 30s
test (21, windows-latest)	8m 59s
test (21, ubuntu-latest)	6m 16s
dockerize	0s
	42m 56s

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