Enable grpc interceptors in serve Context like userHandlers are enabled

[nicolaslopezbravo]

What would you like to be added?

embed's serve creates a new v3rpc grpc server but doesn't make use of the interceptor option. Could serve context have userInterceptors similar to userHandlers so the user can add & pass in interceptors to the grpc server?

Why is this needed?

Extends existing capability, allows for user to add all sorts of useful middleware, monitoring, auth, etc.