Append an operation name to each OpenTelemetry activity

[bh3605]

Describe the feature.

Enabling Open Telemetry support creates telemetry in app insights with no operation name. They bucket in a single <Empty> operation.

Describe the requested feature

Append an operation name to the activity. Could be "EndpointName: send message", "EndpointName: publish event", etc.

Describe alternatives you've considered

Rolling my own implementation

Additional Context

No response