schedule: fix split-merge-interval update #20943

Job	Run time
chunks (1, Unit Test(1))	5m 24s
chunks (2, Unit Test(2))	3m 31s
chunks (3, Unit Test(3))	4m 43s
chunks (4, Tests(1))	4m 54s
chunks (5, Tests(2))	4m 38s
chunks (6, Tools Test)	5m 43s
chunks (7, Client Integration Test)	5m 29s
chunks (8, TSO Integration Test)	4m 24s
chunks (9, MicroService Integration(!TSO))	3m 54s
chunks (10, MicroService Integration(TSO))	5m 22s
report-coverage	13s
	48m 15s

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