Revisit Tracing integrations

[TimHess]

Follow ups from #1278:

• Is there significant value in the Steeltoe Tracing package? Compare with what Aspire does with regard to OpenTelemetry, maybe Steeltoe should exit this space or provide a slimmer way of helping users set up tracing
• Export to Jaeger has been deprecated in favor of OTLP, we should remove Jaeger references
• Wavefront integration does not behave like the other exporters (eg: private reference), it should align better
  • The Wavefront exporter should be tested against Wavefront again. I noticed the tracing sample will fail repeatedly sending metrics with the non-key that's configured, should we do more than check for the presence of a Uri when turning that on?

Work on adding Zipkin support for OTLP has begun here, but does not yet look ready for the Zipkin exporting to go away