fix(chaos-tests): add missing httpclient-vertx-5 profile
The e2e-chaos-tests workflow matrix includes vertx-5 as an HTTP client
option, but the chaos-tests pom.xml was missing the corresponding
httpclient-vertx-5 Maven profile. This caused Maven to proceed without
any HTTP client dependency, resulting in "No httpclient implementations
found" errors.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>