feat: allow overriding test infrastructure kube client separately #5101

Job	Run time
check_format_and_unit_tests	1m 11s
build / Special integration tests (17)	1m 43s
build / Special integration tests (21)	1m 45s
build / Special integration tests (24)	1m 41s
build / httpclient-tests (jdk) / Integration tests (24, 1.32.0, jdk)	22m 19s
build / httpclient-tests (jetty) / Integration tests (24, 1.32.0, jetty)	22m 47s
build / httpclient-tests (vertx) / Integration tests (24, 1.32.0, vertx)	22m 13s
build / integration_tests (17, 1.30.8) / Integration tests (17, 1.30.8, vertx)	21m 22s
build / integration_tests (17, 1.31.4) / Integration tests (17, 1.31.4, vertx)	22m 43s
build / integration_tests (17, 1.32.0) / Integration tests (17, 1.32.0, vertx)	22m 58s
build / integration_tests (17, v1.29.12) / Integration tests (17, v1.29.12, vertx)	20m 41s
build / integration_tests (21, 1.30.8) / Integration tests (21, 1.30.8, vertx)	21m 57s
build / integration_tests (21, 1.31.4) / Integration tests (21, 1.31.4, vertx)	23m 8s
build / integration_tests (21, 1.32.0) / Integration tests (21, 1.32.0, vertx)	22m 34s
build / integration_tests (21, v1.29.12) / Integration tests (21, v1.29.12, vertx)	21m 17s
build / integration_tests (24, 1.30.8) / Integration tests (24, 1.30.8, vertx)	21m 20s
build / integration_tests (24, 1.31.4) / Integration tests (24, 1.31.4, vertx)	22m 35s
build / integration_tests (24, 1.32.0) / Integration tests (24, 1.32.0, vertx)	22m 21s
build / integration_tests (24, v1.29.12) / Integration tests (24, v1.29.12, vertx)	21m 20s
	5h 37m 55s

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