Add missing LDM metrics into test suite

Author: dbudziwojskiNR

charts/nr-k8s-otel-collector/docs/metrics-full.md

@@ -621,7 +621,7 @@
 | Kubelet            | Prometheus Receiver   | authentication_token_cache_request_duration_seconds                    | Histogram         | Duration of authentication token cache requests.                                         |
 | Kubelet            | Prometheus Receiver   | authentication_token_cache_request_total                               | Counter           | Total count of authentication token cache requests.                                      |
 | Kubelet            | KubeletStats Receiver | container.cpu.time                                                     | Gauge             | Total CPU time used by the container.                                                    |
-| Kubelet            | KubeletStats Receiver | container.cpu.utilization                                              | Gauge             | CPU utilization percentage of the container.                                             |
+| Kubelet            | KubeletStats Receiver | container.cpu.usage                                                    | Gauge             | Total CPU usage (sum of all cores per second) averaged over the sample window.           |
 | Kubelet            | KubeletStats Receiver | container.filesystem.available                                         | Gauge             | Available filesystem space for the container.                                            |
 | Kubelet            | KubeletStats Receiver | container.filesystem.capacity                                          | Gauge             | Total filesystem capacity for the container.                                             |
 | Kubelet            | KubeletStats Receiver | container.filesystem.usage                                             | Gauge             | Used filesystem space for the container.                                                 |
@@ -737,7 +737,7 @@
 | Kubelet            | Prometheus Receiver   | hidden_metrics_total                                                   | Counter           | Total number of hidden metrics.                                                          |
 | Kubelet            | KubeletStats Receiver | k8s.container.cpu_limit_utilization                                    | Gauge             | CPU utilization relative to the limit for the container.                                 |
 | Kubelet            | KubeletStats Receiver | k8s.node.cpu.time                                                      | Gauge             | Total CPU time used by the node.                                                         |
-| Kubelet            | KubeletStats Receiver | k8s.node.cpu.utilization                                               | Gauge             | CPU utilization percentage of the node.                                                  |
+| Kubelet            | KubeletStats Receiver | k8s.node.cpu.usage                                                     | Gauge             | Total CPU usage (sum of all cores per second) averaged over the sample window.           |
 | Kubelet            | KubeletStats Receiver | k8s.node.filesystem.available                                          | Gauge             | Available filesystem space for the node.                                                 |
 | Kubelet            | KubeletStats Receiver | k8s.node.filesystem.capacity                                           | Gauge             | Total filesystem capacity for the node.                                                  |
 | Kubelet            | KubeletStats Receiver | k8s.node.filesystem.usage                                              | Gauge             | Used filesystem space for the node.                                                      |