improve: moving some integration test into packages, some @Sample cleanup #5969

Job	Run time
check_format_and_unit_tests	1m 39s
build / Special integration tests (21)	2m 27s
build / Special integration tests (25)	2m 8s
build / Special integration tests (17)	2m 5s
build / httpclient-tests (vertx) / Integration tests (25, 1.32.0, vertx)	25m 17s
build / httpclient-tests (jetty) / Integration tests (25, 1.32.0, jetty)	26m 32s
build / httpclient-tests (jdk) / Integration tests (25, 1.32.0, jdk)	26m 7s
build / integration_tests (21, 1.33.1) / Integration tests (21, 1.33.1, vertx)	26m 29s
build / integration_tests (25, 1.31.8) / Integration tests (25, 1.31.8, vertx)	26m 7s
build / integration_tests (17, 1.32.4) / Integration tests (17, 1.32.4, vertx)	26m 5s
build / integration_tests (17, 1.30.12) / Integration tests (17, 1.30.12, vertx)	24m 47s
build / integration_tests (21, 1.31.8) / Integration tests (21, 1.31.8, vertx)	26m 26s
build / integration_tests (21, 1.30.12) / Integration tests (21, 1.30.12, vertx)	25m 0s
build / integration_tests (25, 1.30.12) / Integration tests (25, 1.30.12, vertx)	24m 17s
build / integration_tests (25, 1.33.1) / Integration tests (25, 1.33.1, vertx)	26m 18s
build / integration_tests (21, 1.32.4) / Integration tests (21, 1.32.4, vertx)	25m 35s
build / integration_tests (17, 1.31.8) / Integration tests (17, 1.31.8, vertx)	26m 29s
build / integration_tests (17, 1.33.1) / Integration tests (17, 1.33.1, vertx)	26m 5s
build / integration_tests (25, 1.32.4) / Integration tests (25, 1.32.4, vertx)	24m 23s
	6h 34m 16s

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