[FLINK-34571][test] Fix flaky test SortMergeResultPartitionReadSchedu… #205

Job	Run time
Default (Java 8) / Compile	10m 10s
Pre-compile Checks / Basic QA	7m 41s
Default (Java 8) / Test packaging/licensing	34m 22s
Default (Java 8) / E2E (group 1)	3h 17m 2s
Default (Java 8) / Test (module: core)	38m 2s
Default (Java 8) / E2E (group 2)	1h 58m 1s
Default (Java 8) / Test (module: python)	30m 41s
Default (Java 8) / Test (module: table)	34m 32s
Default (Java 8) / Test (module: connect)	19m 30s
Default (Java 8) / Test (module: tests)	44m 48s
Default (Java 8) / Test (module: misc)	46m 57s
	9h 41m 46s

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