Without this change we have no way to pass the ObservationRegistry that is registered in the given test's ApplicationContext as the one that should be used by the ObservationThreadLocalAccessor.
With this change we introduce a TestExecutionListener that will set an ObservationRegistry registered in the test's ApplicationContext for each test class and after each test class will restore the previously stored ObservationRegistry instance.
Comment From: marcingrzejszczak
cc @rstoyanchev after upgrading the context propagation library I needed to update one class
Comment From: marcingrzejszczak
- superseded by #30658