Manually declaring `junit-platform-launcher` for `testCommon` #980

Job	Run time
spotlessCheck assemble testClasses	1m 21s
build (maven, 11, ubuntu-latest)	54s
build (maven, 17, ubuntu-latest)	59s
build (gradle, 11, ubuntu-latest)	1m 55s
build (gradle, 17, ubuntu-latest)	1m 11s
build (maven, 11, windows-latest)	2m 28s
build (gradle, 17, windows-latest)	13m 16s
build (npm, 11, ubuntu-latest)	51s
	22m 55s

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