Update Go services to use Splunk Distribution of OpenTelemetry Go #122
Description
Currently the Go services use https://github.com/signalfx/signalfx-go-tracing while they should use https://github.com/signalfx/splunk-otel-go instead.
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Currently the Go services use https://github.com/signalfx/signalfx-go-tracing while they should use https://github.com/signalfx/splunk-otel-go instead.