Add instrumentation for vert.x event bus tracing

[breedx-splk]

The vert.x event bus has native library instrumentation support for tracing (docs here). 🥳

This is not enabled by default, because the VertxOptions passed to the Vertx.vertx() factory need to contain OpenTelemetryOptions that contain the OpenTelemetry instance. Furthermore, the default TracingPolicy for event DeliveryOptions is the enum PROPAGATE, which does not create new spans when events are sent between peers.

It would be helpful to some javaagent users to get this working out of the box.