Support "Info" metrics

[Limess]

Info metrics were added with first class support in 0.10.0 of the Prometheus Java client, see prometheus/client_java#615 for the exact change.

See https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#info in the OpenMetrics specification for more details.

[kirillsalykin]

+1 for this change

[kirillsalykin]

Using this should do the trick https://github.com/prometheus/client_java/blob/master/simpleclient_hotspot/src/main/java/io/prometheus/client/hotspot/DefaultExports.java.