api: more informative request canceling #3883

Job	Run time
run-tests-ce (1.20, 1.10, false, false)	4m 18s
testing_mac_os (1.20, macos-12, brew)	4m 49s
run-tests-ce (1.20, 2.8, false, false)	4m 13s
testing_mac_os (1.20, macos-12, 1.10.15)	4m 38s
run-tests-ce (1.20, 2.10, false, false)	4m 35s
testing_mac_os (1.20, macos-14, brew)	3m 55s
run-tests-ce (1.20, master, false, false)	4m 50s
testing_mac_os (stable, macos-12, brew)	5m 10s
run-tests-ce (stable, 1.10, false, false)	4m 36s
testing_mac_os (stable, macos-12, 1.10.15)	4m 58s
run-tests-ce (stable, 2.8, false, false)	4m 24s
testing_mac_os (stable, macos-14, brew)	3m 48s
run-tests-ce (stable, 2.10, false, false)	4m 38s
run-tests-ce (stable, master, false, false)	4m 48s
run-tests-ce (master, true, 1.20)	6m 15s
run-tests-ce (master, true, 1.20, false)	4m 55s
	1h 14m 50s

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