ServiceTalkJacksonSerializerAutoDiscoverable

https://github.com/apple/servicetalk/actions/runs/9961701940/job/27523822059#step:8:722

```
Run JerseyRouterTestSuite with ServiceTalkJacksonSerializerAutoDiscoverable > JUnit Jupiter > AsynchronousResourceTest > getVoidCompletion(boolean, RouterApi) > ASYNC_STREAMING server-no-offloads = false FAILED
java.lang.AssertionError:
Expected: is <200 OK>
but: was <204 No Content>
at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertStatus(AbstractJerseyStreamingHttpServiceTest.java:373)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertResponse(AbstractJerseyStreamingHttpServiceTest.java:331)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertResponse(AbstractJerseyStreamingHttpServiceTest.java:317)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertResponse(AbstractJerseyStreamingHttpServiceTest.java:296)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertResponse(AbstractJerseyStreamingHttpServiceTest.java:277)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.sendAndAssertNoResponse(AbstractJerseyStreamingHttpServiceTest.java:263)
at io.servicetalk.http.router.jersey.AsynchronousResourceTest.lambda$getVoidCompletion$20(AsynchronousResourceTest.java:331)
at io.servicetalk.http.router.jersey.AbstractJerseyStreamingHttpServiceTest.runTwiceToEnsureEndpointCache(AbstractJerseyStreamingHttpServiceTest.java:392)
at io.servicetalk.http.router.jersey.AsynchronousResourceTest.getVoidCompletion(AsynchronousResourceTest.java:328)
```

Start with the linked CI run and io.servicetalk.http.router.jersey.AsynchronousResourceTest.java at getVoidCompletion, then read the referenced helpers in AbstractJerseyStreamingHttpServiceTest.java. Reproduce the ASYNC_STREAMING failure and trace why the test receives 204 No Content instead of 200 OK; done means the test passes with the intended status.

Written by the indexing model from the issue text.