feat: allow overriding test infrastructure kube client separately #5448

Job	Run time
check_format_and_unit_tests	1m 21s
build / Special integration tests (21)	2m 1s
build / Special integration tests (17)	1m 59s
build / Special integration tests (24)	1m 54s
build / httpclient-tests (vertx) / Integration tests (24, 1.32.0, vertx)	23m 47s
build / httpclient-tests (jdk) / Integration tests (24, 1.32.0, jdk)	23m 58s
build / httpclient-tests (jetty) / Integration tests (24, 1.32.0, jetty)	23m 39s
build / integration_tests (17, 1.30.12) / Integration tests (17, 1.30.12, vertx)	22m 5s
build / integration_tests (17, 1.33.1) / Integration tests (17, 1.33.1, vertx)	24m 18s
build / integration_tests (17, 1.31.8) / Integration tests (17, 1.31.8, vertx)	24m 13s
build / integration_tests (21, 1.31.8) / Integration tests (21, 1.31.8, vertx)	24m 17s
build / integration_tests (21, 1.33.1) / Integration tests (21, 1.33.1, vertx)	23m 34s
build / integration_tests (21, 1.32.4) / Integration tests (21, 1.32.4, vertx)	23m 46s
build / integration_tests (24, 1.30.12) / Integration tests (24, 1.30.12, vertx)	22m 0s
build / integration_tests (17, 1.32.4) / Integration tests (17, 1.32.4, vertx)	23m 29s
build / integration_tests (21, 1.30.12) / Integration tests (21, 1.30.12, vertx)	22m 24s
build / integration_tests (24, 1.31.8) / Integration tests (24, 1.31.8, vertx)	23m 24s
build / integration_tests (24, 1.33.1) / Integration tests (24, 1.33.1, vertx)	24m 26s
build / integration_tests (24, 1.32.4) / Integration tests (24, 1.32.4, vertx)	23m 20s
	5h 59m 55s

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