Make @RunOnVirtualThread capture and run in a duplicated context

[cescoffier]

With that change, the virtual thread gets the duplicated context of the request, allowing the propagation.

With this change, the following code:

@RunOnVirtualThread
@GET
public String hello() {
    return "hello " + Thread.currentThread() + " / " + Vertx.currentContext() + " / " + VertxContext.isOnDuplicatedContext();
}

produces:

=> hello VirtualThread[#198]/runnable@ForkJoinPool-1-worker-2 / io.vertx.core.impl.DuplicatedContext@752a5bde / true

It means that the virtual thread has access to the request duplicated context (that includes request scope, tracing, local data written by a filter...)

[quarkus-bot]

✔️ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.