Define resource semantic convention stability and justification

[jsuereth]

• Define what must remain stable in resource detection
• Outline issues with changes to resource attributes and the associated identity of telemetry streams

NOTE: This is incomplete and posted for discussion purposes only.

[Oberon00]

There is some related discussion on "identifying vs describing resource attributes" here: https://github.com/open-telemetry/opentelemetry-specification/issues/1298#issuecomment-775791904

[tedsuo]

@jsuereth is this otep still relevant/needed?

[jsuereth]

@tedsuo The problem is relevant the solution is not. I'm closing this draft for now, as I'm crafting up a more targeted proposal for resource conventions for now.