Fix reference count bug in partition batcher #32350

Job	Run time
windows-service-test (windows-2025)	3m 41s
windows-unittest (windows-2022)	16m 3s
windows-unittest (windows-11-arm)	11m 49s
windows-service-test (windows-2022)	3m 21s
windows-unittest (windows-2025)	18m 24s
windows-service-test (windows-11-arm)	3m 36s
	56m 54s

Provide feedback