Build

Bump spring-boot to 3.5.12 #6279

Job	Run time
lighty_rnc_app_test / build	7m 34s
lighty_rnc_cluster_app_test / build	9m 39s
build	18m 41s
lighty_rcgnmi_app_test / build	6m 35s
	42m 29s

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