`otelgrpc.WithSpanOption` is not considered when using a `otelgrpc` stats handler.

[jan-xyz]

Description

otelgrpc.WithSpanOption is not considered when using a otelgrpc stats handler.

Environment

• OS: any
• Architecture: any
• Go Version: any
• otelgrpc version: v0.60.0

Steps To Reproduce

using this code does nothing:

	grpcServer := grpc.NewServer(
		grpc.StatsHandler(otelgrpc.NewServerHandler(
			otelgrpc.WithSpanOptions(trace.WithNewRoot()),
		)),
	)

because the option that is being set is never used.

Expected behavior

The Option should either be deprecated along with the interceptors or implemented.

I do think otelgrpc.WithSpanOptions is quite dangerous and using it requires one to understand the workings of the stats handler and might override things like the span kind and other things otherwise set by the stats handler. So it might be a good idea to also deprecate it and rather add more options that cover other use-cases. On the otelhttp package there is an Option PublicEndpoint which provides the WithNewRoot() option, and maybe we rather want something like that here as well? I would also suggest to set a link to the incoming trace context like it is suggested in the documentation and also present in the otelhttp implementation.