Add client side OTEL support

[markphelps]

We should try to add OTEL tracing support for our client side sdks where possible. I think we could do this in 3-4 places to get best coverage:

1. Go SDK: add to native Go code since it handles most of the operations (pulling / streaming state and calling into the wasm engine for eval
2. JS SDK: similar to above, add here if possible as it performs most ops in native code
3. Rust FFI engine: add here for the remaining SDKs since it does all the heavy lifting, this would prevent us from having to support it in each language

We can break this down into separate sub issues if needed