Collect Azure Functions telemetry data using OpenTelemetry

[zmoog]

Instead of using a custom implementation, let's try to use OpenTelemetry to collect Azure Functions execution data.

Ideas:

• build an opentelemetry-instrumentation-azure-functions, something like https://pypi.org/project/opentelemetry-instrumentation-django/

References:

• https://opentelemetry.io/docs/instrumentation/python/
• OpenTelemetry for Python Developers