proposal: contrib/cloud.google.com/go/pubsub.v1 should support custom resource names

[bendiknesbo]

Package Name

contrib/cloud.google.com/go/pubsub

Package Version(s)

2.0.1

Describe the feature you'd like

The contrib for cloud.google.com/go/pubsub.v1 does not support a way to override the resource-name for the span, so it always ends up as projects/<project-id>/topics/<topic-id> (as a result of tracer.ResourceName(topic.String()) being passed to tracer.StartSpanFromContext: https://github.com/DataDog/dd-trace-go/blob/v2.0.1/contrib/cloud.google.com/go/pubsub.v1/internal/tracing/tracing.go#L50

The only options we can pass is to override the Service-name or setting Measured.

We would like the ability to specify the resource, so that it's easier for us to grok what messages are being sent on PubSub.

Is your feature request related to a problem?

No response

Describe alternatives you've considered

No response

Additional context

No response