Fix khttp client instrumentation #3929

Job	Run time
test-latest-deps	7m 13s
shellcheck	5s
build	7m 58s
license-check	2m 8s
setup-muzzle-matrix	2m 0s
generate-metadata	2m 6s
check-links / link-check	7s
smoke-test (ubuntu-24.04, profiler)	14m 31s
smoke-test (ubuntu-24.04, jboss)	4m 17s
smoke-test (ubuntu-24.04, jetty)	8m 31s
smoke-test (ubuntu-24.04, glassfish)	8m 45s
smoke-test (ubuntu-24.04, wildfly)	12m 6s
smoke-test (ubuntu-24.04, liberty)	18m 7s
smoke-test (ubuntu-24.04, tomee)	6m 41s
smoke-test (ubuntu-24.04, tomcat)	6m 36s
smoke-test (ubuntu-24.04, other)	7m 21s
smoke-test (ubuntu-24.04, weblogic)	4m 18s
smoke-test (ubuntu-24.04, websphere)	6m 1s
muzzle (:instrumentation:jdbc)	2m 37s
muzzle (:instrumentation:khttp)	2m 38s
muzzle (:instrumentation:websphere)	2m 31s
muzzle (:instrumentation:wildfly)	2m 35s
muzzle (:instrumentation:jetty)	2m 36s
muzzle (:instrumentation:weblogic)	2m 23s
muzzle (:instrumentation:liberty)	2m 33s
muzzle (:instrumentation:nocode)	2m 26s
muzzle (:instrumentation:tomcat)	2m 37s
	2h 21m 47s

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