Added queries and hits metrics for the Offloading Connector. Also added timing metrics for store and load operations, which take the average time it takes to load/store, per-token. The metrics are available from Prometheus and from the StatLogger. Signed-off-by: omerpaz95 <omerpaz95@gmail.com> Co-authored-by: Omer Paz <Omer.Paz@ibm.com>