Refactor TestFlows tests related to Lightweight #330

Job	Run time
build-kafka-lightweight / build	2m 58s
testflows-lightweight / testflows-lightweight	1h 7m 20s
java-tests-lightweight / java-lightweight	35m 7s
testflows-kafka / testflows-kafka	30m 13s
java-tests-kafka / java-kafka	1m 34s
	2h 17m 12s

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