Separate Cache metrics into different subservices in Jopr

The current Jopr plugin shows a Cache with different metrics for each individual metric available in the cache, i.e. cache stores, cache loades, average repl time...etc.

This set up was fine when there was only a handful of metrics, but we after adding all the different managed attributes, we have around ~43 metrics now (some obviously but not always be present, i.e. metrics related to cache stores, deadlock detecting manager...etc), but they still appear but with no metrics at all.

So, as the number of metrics increase, you have a massive list of different values under Cache.

I think it'd be good to separate attributes from different interceptors into different services under Cache, i.e Statistics, Cache Store, Passivation/Activation...etc.

This would make it cleaner to read to the user.