A cache with off heap exposes cluster and local stats

When adding a cache that has off heap both sets of stats are exposed. We should only expose the cluster one when the cache is clustered.

```
vendor_cache_manager_default_cache_default_openshift_cluster_cache_stats_activations

{node="wburns-19189"} 0.0
vendor_cache_manager_default_cache_default_openshift_activation_activation_count{node="wburns-19189"}

0.0
```