instrumentation-load.js in frontend does not seem to work..?

[howardyoo]

symptom

Even though the instrumentation-load.js which covers the otel web instrumentation is loaded, it does not seem to emit any traces.
steps to reproduce:

1. open up the /src/frontend/dist/instrumentation-load.js
2. modify the line that has the settings for receiving traces to the local opentelemetry collector - which should be able to receive the traces.
   change

const exporter = new _opentelemetryExporterCollector.CollectorTraceExporter({
  url: 'https://microservicescollector.honeydemo.io:443/v1/traces'
});

into:

const exporter = new _opentelemetryExporterCollector.CollectorTraceExporter({
    url: 'http://opentelemetry-collector:4319/v1/traces'
  });

(port 4318 also works, as it is another http otel port)

3. Run the microservice-demo.
4. observe that there is no trace flowing into the designated dataset (which is microservices-browser)

I have tried similar approach using another bundled otel web sdk js that I made, and it was able to send traces properly to the endpoint, so I am suspecting that something in the instrumentation-load.js is not working properly (I'm not sure what, though). Anyway, thought it would be helpful to report it.