Improve pipe unit tests #30252

Job	Run time
unit-test (17, ubuntu-latest, datanode)	25m 14s
unit-test (17, windows-latest, others)	27m 9s
unit-test (17, ubuntu-latest, others)	19m 34s
unit-test (17, windows-latest, datanode)	34m 53s
	1h 46m 50s

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