open-telemetry: for gRPC

[jknack]

<dependency>
    <groupId>io.opentelemetry.instrumentation</groupId>
    <artifactId>opentelemetry-grpc-1.6</artifactId>
    <version>2.26.1-alpha</version>
</dependency>

{
   install(new OtelModule());

   var grpcTelemetry = GrpcTelemetry.create(require(OpenTelemetry.class));
   install(new GrpcModule(new GreeterService()
     .withServer(server -> server.intercept(grpcTelemetry.newServerInterceptor()))
     .withChannel(channel -> channel.intercept(grpcTelemetry.newClientInterceptor()))
   )); 
}