Create an interceptor to log server responses that have an internal error

[mkysel]

https://github.com/grpc/grpc-go/tree/master/examples/features/interceptor

[mkysel]

@neekolas @richardhuaaa can the creator of this task write some explanation blurp of the moving pieces in the description please?

[neekolas]

When we return an error from a GRPC handler it would be great if we can log that error in a GRPC interceptor, instead of having to log the message manually.

GRPC interceptors are basically just middleware and would let you handle this generically.