Expose metrics via prometheus.monitoring.coreos.com/v1
The exposed metrics are
| Metric | Type | Meaning |
| --------------- | ---------------- | ---------------- |
| `nfd_master_build_info` | Gauge | Version from which nfd-master was built. |
| `nfd_worker_build_info` | Gauge | Version from which nfd-worker was built. |
| `nfd_updated_nodes` | Counter | Time taken to label a node |
| `nfd_crd_processing_time` | Gauge | Time taken to process a NodeFeatureRule CRD |
| `nfd_feature_discovery_duration_seconds` | HistogramVec | Time taken to discover features on a node |
Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>
Co-authored-by: Markus Lehtonen <markus.lehtonen@intel.com>
