api: fix splice update operation #3444

Job	Run time
run-tests-ce (1.13, 1.10, false, false)	2m 27s
run-tests-ee (release/linux/x86_64/1.10/, sdk-1.10.15-0-r598, false, false, false)	2m 15s
run-tests-ce (1.13, 2.8, false, false)	4m 39s
run-tests-ce (1.13, 2.10, false, false)	4m 57s
run-tests-ee (release/linux/x86_64/2.10/, sdk-gc64-2.10.8-0-r598.linux.x86_64, false, true)	4m 40s
testing_mac_os (1.13, macos-11, brew)	10m 30s
run-tests-ee (release/linux/x86_64/2.11/, sdk-gc64-2.11.1-0-r598.linux.x86_64, true, true)	6m 2s
run-tests-ce (1.13, master, false, false)	4m 39s
testing_mac_os (1.13, macos-11, 1.10.14)	3m 53s
run-tests-ce (master, true, 1.13)	5m 57s
testing_mac_os (1.13, macos-12, brew)	7m 55s
run-tests-ce (master, true, 1.18, false)	4m 35s
testing_mac_os (1.13, macos-12, 1.10.14)	3m 27s
	1h 5m 56s

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