improve: prepare for removal of exitOnStopLeading from public API #6075

Job	Run time
build / Special integration tests (25)	2m 18s
build / Special integration tests (17)	2m 11s
check_format_and_unit_tests	1m 18s
build / httpclient-tests (jetty) / Integration tests (25, 1.32.0, jetty)	26m 35s
build / Special integration tests (21)	2m 20s
build / integration_tests (25, 1.31.8) / Integration tests (25, 1.31.8, vertx)	26m 44s
build / httpclient-tests (jdk) / Integration tests (25, 1.32.0, jdk)	26m 44s
build / integration_tests (17, 1.31.8) / Integration tests (17, 1.31.8, vertx)	27m 17s
build / integration_tests (25, 1.32.4) / Integration tests (25, 1.32.4, vertx)	26m 57s
build / httpclient-tests (vertx) / Integration tests (25, 1.32.0, vertx)	26m 14s
build / integration_tests (17, 1.33.1) / Integration tests (17, 1.33.1, vertx)	27m 13s
build / integration_tests (25, 1.33.1) / Integration tests (25, 1.33.1, vertx)	27m 33s
build / integration_tests (21, 1.31.8) / Integration tests (21, 1.31.8, vertx)	27m 13s
build / integration_tests (25, 1.30.12) / Integration tests (25, 1.30.12, vertx)	29m 54s
build / integration_tests (21, 1.32.4) / Integration tests (21, 1.32.4, vertx)	25m 4s
build / integration_tests (21, 1.30.12) / Integration tests (21, 1.30.12, vertx)	25m 28s
build / integration_tests (17, 1.32.4) / Integration tests (17, 1.32.4, vertx)	26m 52s
build / integration_tests (17, 1.30.12) / Integration tests (17, 1.30.12, vertx)	25m 9s
build / integration_tests (21, 1.33.1) / Integration tests (21, 1.33.1, vertx)	27m 1s
	6h 50m 5s

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