Update mockito-core to 5.15.2 #2376

Job	Run time
conformance	1m 52s
build (2_12, e2e)	3m 26s
build (2_12, test)	10m 18s
build (2_13, e2e)	4m 28s
build (2_13, test)	13m 4s
build (3, e2e)	4m 35s
build (3, test)	8m 35s
build (2_12, examples_and_formatting)	2m 59s
build (2_13, scala3_compat_test)	7m 6s
build (3, scala3_compat_test)	9m 51s
ci-passed	1s
	1h 6m 15s

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