PlatformCompat: inline `prepareCommand` #6226

Job	Run time
formatting	26s
native-image (macOS-latest, default)	4m 51s
community-test (11, windows-latest, Scala2)	14m 57s
scala-native	0s
native-image (ubuntu-latest, default)	4m 27s
community-test (11, windows-latest, Scala3)	14m 24s
native-image (ubuntu-latest, musl)	4m 28s
community-test (11, windows-latest, Spark)	24m 1s
community-test (11, windows-latest, Intellij)	16m 37s
community-test (11, windows-latest, Other)	21m 0s
test (11, windows-latest, jvm, 2.12.20)	6m 11s
community-test (11, ubuntu-latest, Scala2)	13m 16s
test (11, windows-latest, jvm, 2.13.16)	6m 0s
community-test (11, ubuntu-latest, Scala3)	13m 5s
test (11, windows-latest, native, 2.12.20)	12m 26s
community-test (11, ubuntu-latest, Spark)	21m 43s
test (11, windows-latest, native, 2.13.16)	14m 46s
community-test (11, ubuntu-latest, Intellij)	14m 46s
test (11, ubuntu-latest, jvm, 2.12.20)	5m 0s
community-test (11, ubuntu-latest, Other)	16m 20s
test (11, ubuntu-latest, jvm, 2.13.16)	4m 57s
test (11, ubuntu-latest, native, 2.12.20)	9m 44s
test (11, ubuntu-latest, native, 2.13.16)	11m 57s
test (21, windows-latest, jvm, 2.12.20)	6m 26s
test (21, windows-latest, jvm, 2.13.16)	6m 19s
test (21, windows-latest, native, 2.12.20)	12m 14s
test (21, windows-latest, native, 2.13.16)	14m 14s
test (21, ubuntu-latest, jvm, 2.12.20)	4m 39s
test (21, ubuntu-latest, jvm, 2.13.16)	4m 25s
test (21, ubuntu-latest, native, 2.12.20)	8m 49s
test (21, ubuntu-latest, native, 2.13.16)	11m 12s
dockerize	0s
	5h 23m 40s

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