Record exceptions in gRPC request handling

[Haydabase]

Feature Request

Is your feature request related to a problem?

The instrumentation library for AspNetCore records unhandled exceptions during handling of HTTP requests, adding them as an event to the Activity, and calling the configured Enrich action with an "OnException" event.
The same is not true for exceptions thrown during gRPC request handling, as these are swallowed by ServerCallHandlerBase in the Grpc.AspNetCore library.

Describe the solution you'd like:

Record exceptions thrown thrown during gRPC request handling if EnableGrpcAspNetCoreSupport is true:

• Add an event to the Activity.
• Call Enrich with an "OnException" event.

This will likely require some diagnostic events to be emitted from the HttpContextServerCallContext in the Grpc.AspNetCore library.

Describe alternatives you've considered.

One work around is to do record the exception and enrich the Activity in a gRPC interceptor, but seems unnecessary boilerplate, requiring separate configuration, in order to bring the features of gRPC tracing up to parity with regular HTTP tracing.

[scalalang2]

It seems no one has taken this issue.