PlatformCompat: inline `prepareCommand` #6225

Job	Run time
native-image (macOS-latest, default)	5m 28s
test (11, windows-latest, jvm, 2.12.20)	6m 35s
native-image (ubuntu-latest, default)	4m 29s
community-test (11, windows-latest, Scala2)	14m 53s
test (11, windows-latest, jvm, 2.13.16)	6m 14s
native-image (ubuntu-latest, musl)	4m 35s
community-test (11, windows-latest, Scala3)	14m 34s
test (11, windows-latest, native, 2.12.20)	12m 36s
community-test (11, windows-latest, Spark)	24m 9s
test (11, windows-latest, native, 2.13.16)	14m 28s
community-test (11, windows-latest, Intellij)	16m 44s
formatting	19s
scala-native	0s
test (11, ubuntu-latest, jvm, 2.12.20)	5m 8s
community-test (11, windows-latest, Other)	20m 52s
test (11, ubuntu-latest, jvm, 2.13.16)	4m 44s
community-test (11, ubuntu-latest, Scala2)	13m 20s
test (11, ubuntu-latest, native, 2.12.20)	9m 1s
community-test (11, ubuntu-latest, Scala3)	12m 4s
test (11, ubuntu-latest, native, 2.13.16)	11m 43s
community-test (11, ubuntu-latest, Spark)	21m 48s
test (21, windows-latest, jvm, 2.12.20)	6m 52s
community-test (11, ubuntu-latest, Intellij)	15m 13s
test (21, windows-latest, jvm, 2.13.16)	6m 31s
community-test (11, ubuntu-latest, Other)	17m 52s
test (21, windows-latest, native, 2.12.20)	11m 54s
test (21, windows-latest, native, 2.13.16)	14m 23s
test (21, ubuntu-latest, jvm, 2.12.20)	4m 55s
test (21, ubuntu-latest, jvm, 2.13.16)	4m 26s
test (21, ubuntu-latest, native, 2.12.20)	8m 48s
test (21, ubuntu-latest, native, 2.13.16)	11m 3s
dockerize	0s
	5h 25m 41s

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