api: more informative request canceling #3879

Job	Run time
testing_mac_os (1.20, macos-12, brew)	6m 15s
run-tests-ce (1.20, 1.10, false, false)	4m 30s
testing_mac_os (1.20, macos-12, 1.10.15)	5m 31s
run-tests-ce (1.20, 2.8, false, false)	4m 18s
testing_mac_os (1.20, macos-14, brew)	3m 52s
run-tests-ce (1.20, 2.10, false, false)	2m 27s
testing_mac_os (stable, macos-12, brew)	5m 28s
run-tests-ce (1.20, master, false, false)	4m 35s
testing_mac_os (stable, macos-12, 1.10.15)	5m 20s
run-tests-ce (stable, 1.10, false, false)	4m 25s
testing_mac_os (stable, macos-14, brew)	3m 50s
run-tests-ce (stable, 2.8, false, false)	4m 36s
run-tests-ce (stable, 2.10, false, false)	4m 54s
run-tests-ce (stable, master, false, false)	5m 0s
run-tests-ce (master, true, 1.20)	6m 13s
run-tests-ce (master, true, 1.20, false)	4m 39s
	1h 15m 53s

Provide feedback