docs: withKubernetesClient improved docs #4853

Job	Run time
check_format_and_unit_tests	10s
special_integration_tests (11)	1m 50s
special_integration_tests (17)	1m 43s
httpclient-tests (jdk) / integration_tests	18m 39s
httpclient-tests (jetty) / integration_tests	19m 0s
httpclient-tests (vertx) / integration_tests	19m 16s
integration_tests (11, 1.30.3) / integration_tests	19m 21s
integration_tests (11, 1.31.0) / integration_tests	20m 6s
integration_tests (11, v1.28.12) / integration_tests	19m 23s
integration_tests (11, v1.29.7) / integration_tests	19m 13s
integration_tests (17, 1.30.3) / integration_tests	19m 41s
integration_tests (17, 1.31.0) / integration_tests	20m 41s
integration_tests (17, v1.28.12) / integration_tests	19m 11s
integration_tests (17, v1.29.7) / integration_tests	19m 20s
	3h 37m 34s

Provide feedback