Proposal

Similar to prometheus/proposals#49, but focused on Prometheus direct use of those yaml libraries.

Looks like gopkg.in/yaml.* project seems to be deprecated. Also v2 is EOL.

The https://github.com/goccy/go-yaml is being recommended, also by the author of gopkg.in/yaml. I checked briefly and it looks healthy and even more capable, especially around YAML marshal/unmarshal customizations.

Kudos to @kakkoyun who surfaced this earlier on client_golang.