Metrics exemplars

[dyladan]

open-telemetry/oteps#113

Still waiting on spec, but this OTEP merged. Creating this tracking issue.

[jonahrosenblum]

I would like to claim this issue please.

[dyladan]

Unassigned because internship ended. If I'm wrong about that, please let me know.

[pragmaticivan]

Howdy! Is anyone making any progress on this one?

[vmarchaud]

@pragmaticivan Our current metrics API/SDK is well behind the specification so this isn't something to work on the short term i believe

[pichlermarc]

This issue is quite outdated, and #2594 is tracking the same thing and has had more activity. 🤔
I think we can close this and continue over at #2594 🙂

[legendecas]

Closing in favor of #2594.