Versioned metrics: Shipping the first Release Candidate metrics in hostmetrics

OpenTelemetry Collector Contrib v0.160.0 adds the ability to emit release candidate (RC) process semantic conventions metrics to the hostmetrics receiver’s process scraper, the last stage before a stable v1. The System SIG has worked on this for the better part of a year, and we think that the process metrics are in a good shape – but RC exists so the community can prove that. If you collect process metrics, we’d like you to try the new versioned output and tell us what breaks.