Replace Prometheus Simpleclient by smallrye-metrics

The microprofile-metrics-smallrye extension uses prometheus simple client to collect and expose subsystem metrics because MP Metrics 1.x had blocking limitations (mainly that the metric names must be globally unique and tags/labels were not taken into account to determine uniqueness).

With MP Metrics 2.x, some of these limitations have been removed and it should be possible to use smallrye-metrics internally to expose WildFly subsystem metrics