Migrate to new prometheus client

[kziel1]

Last update of prometheus simpleclient was at 2022. The old dependency stack hinders updates in the company I work for. It would be a big value for me to know if prometheus client update is planned or respective PR would be integrated (beware: breaking changes, like different Collector implementation, MetricFamily, etc.).

https://prometheus.github.io/client_java/migration/simpleclient/

[kziel1]

An attempt of Proof of Concept for Migration to the new prometheus client:
#2223
Generating a sample value hasn't been translated, hence tests not compiling.

[IRus]

Do you think it's possible to keep integration with both versions of Prometheus, so users can decide which one to use for a few years while transition happens?