`tracingTest` helper needs to be redone with OTel

[simkam]

eventing/test/conformance/helpers/tracing_test_helper.go

Lines 59 to 92 in 71a6c9f

	// TODO - redo with OTel
	// Start the event info store. Note this is done _before_ we setup the infrastructure, which
	// sends the event.
	// targetTracker, err := recordevents.NewEventInfoStore(client, recordEventsPodName, client.Namespace)
	// if err != nil {
	// t.Fatal("Pod tracker failed:", err)
	// }
	// Setup the test infrastructure
	// expectedTestSpan, eventMatcher := setupInfrastructure(ctx, t, &channel, client, recordEventsPodName, true)
	// Assert that the event was seen.
	// matches := targetTracker.AssertAtLeast(1, recordevents.MatchEvent(eventMatcher))
	// Match the trace
	// traceID := getTraceIDHeader(t, matches)
	// trace, err := zipkin.JSONTracePred(traceID, 5*time.Minute, func(trace []model.SpanModel) bool {
	// tree, err := tracinghelper.GetTraceTree(trace)
	// if err != nil {
	// return false
	// }
	// // Do not pass t to prevent unnecessary log output.
	// return len(expectedTestSpan.MatchesSubtree(nil, tree)) > 0
	// })
	// if err != nil {
	// t.Logf("Unable to get trace %q: %v. Trace so far %+v", traceID, err, tracinghelper.PrettyPrintTrace(trace))
	// tree, err := tracinghelper.GetTraceTree(trace)
	// if err != nil {
	// t.Fatal(err)
	// }
	// if len(expectedTestSpan.MatchesSubtree(t, tree)) == 0 {
	// t.Fatalf("No matching subtree. want: %v got: %v", expectedTestSpan, tree)
	// }
	// }

tracingTest helper needs to be redone with OTel. Currently, the old code, that used Zipkin, is commented, but that triggers unused linting error.

  Error: test/conformance/helpers/tracing_test_helper.go:53:3: const recordEventsPodName is unused (unused)
  		recordEventsPodName = "recordevents"
  		^
  Error: test/conformance/helpers/tracing_test_helper.go:98:6: func getTraceIDHeader is unused (unused)
  func getTraceIDHeader(t *testing.T, evInfos []recordevents.EventInfo) string {
       ^

I'll remove commented code in #8851, so this is to track TODO and keep a reference to the old code.

[mehrdadbn9]

Hi, I'd like to work on updating the tracingTest helper to use OTel instead of Jaeger. The helper needs to be redone with OpenTelemetry. Could a maintainer please assign it to me? Thank you!