### Feature and motivation

Be able to link custom OpenTelemetry tracing with the default Selenium grid tracing. See for e.g. https://github.com/llatinov/selenium-observability-java/blob/324b500316be34f5f1426720353d0c4e2e8b5a89/selenium-tests/src/main/java/com/automationrhapsody/observability/TracingWebDriver.java#L81 
It will be useful if I am able to pass my Span as a parent span of Selenium's RemoteWebDriver tracing, so I can trace my actions with corresponding grid actions.

### Usage example

Implement a custom tracing that monitors the tests. It will be of great help to be able to make the default server/grid tracing a child of the custom tracking. In this case, users can monitor how a click of a button in their tests links to grid performance.
assertThat(cheeseReq.getHeaderNames()).size().isEqualTo(0);
    try (Span span = tracer.getCurrentContext().createSpan("parent")) {
      span.setAttribute("cheese", "gouda");
      span.setStatus(Status.NOT_FOUND);
      tracer.getPropagator().inject(tracer.getCurrentContext(),
        cheeseReq,
        (req, key, value) -> req.setHeader("cheese", "gouda"));
    }
    assertThat(cheeseReq.getHeaderNames()).size().isEqualTo(1);
    assertThat(cheeseReq.getHeaderNames()).element(0).isEqualTo("cheese");
  }
  @Test
  public void shouldBeAbleToCreateASpanWithAEvent() {
    List<SpanData> allSpans = new ArrayList<>();
    Tracer tracer = createTracer(allSpans);
    String event = "Test event";
    try (Span span = tracer.getCurrentContext().createSpan("parent")) {
      span.addEvent(event);
    }
    assertThat(allSpans).hasSize(1);
    SpanData spanData = allSpans.get(0);
    assertThat(spanData.getEvents()).hasSize(1);
    List<EventData> timedEvents = spanData.getEvents();
    assertThat(timedEvents).element(0).extracting(EventData::getName)
        .isEqualTo(event);
    assertThat(timedEvents).element(0).extracting(EventData::getTotalAttributeCount)
        .isEqualTo(0);
  }
  @Test
  public void shouldBeAbleToCreateASpanWithEvents() {