span: use SetSampled option even if SetTraceID isn't used

lightstep / lightstep-tracer-go

The Lightstep distributed tracing library for Go

https://lightstep.com

MIT License

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Closed neena closed 2 years ago

neena commented 2 years ago

I want to use the SetSampled option to sample spans, without using the SetTraceID option. This PR allows setting those two options independently.