Add option to enable tracing/appinsights

[lenisha]

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Expected/desired behavior

Add option to enable tracing/logs/metrics to flow to App Insights to enable usage reports

[pamelafox]

Good idea! For Python apps, the OpenCensus package is the current way to hook into AppInsights, but OpenTelemetry is going to supercede that soon.

This should be the way to do it for OpenCensus, though I haven't tried it yet myself:

https://learn.microsoft.com/en-us/azure/azure-monitor/app/opencensus-python-request#track-flask-applications

[vrajroutu]

@lenisha #475 Here is my PR for enabling the azure tracing/appinsights

[pamelafox]

We've merged a PR (#515) that adds opentelemetry and also updated the README with information about enabling it (it's opt in). Please file an issue if you see issues with it.