feat(SPRE-1918) Kueue metrics exposure Stage Part 1 (#9201)

We are building kueue dashboard in app-sre grafana instance based on the actual dashboard created per cluster, so we can centralize the view.
There are few metrics to be exposed, this will be the first batch.

Author: rubenmgx

components/monitoring/prometheus/staging/base/monitoringstack/endpoints-params.yaml

@@ -180,6 +180,12 @@
     - '{__name__="kueue_cluster_queue_status"}'
     - '{__name__="kueue_admission_wait_time_seconds_bucket"}'
     - '{__name__="up", job=~".*kueue.*"}'
+    - '{__name__="kueue_admitted_active_workloads", cluster_queue="cluster-pipeline-queue"}'
+    - '{__name__="kueue_pending_workloads", cluster_queue="cluster-pipeline-queue"}'
+    - '{__name__="kueue_admitted_workloads_total"}'
+    - '{__name__="kueue_cluster_queue_resource_reservation", cluster_queue="cluster-pipeline-queue"}'
+    - '{__name__="kueue_cluster_queue_nominal_quota", cluster_queue="cluster-pipeline-queue"}'
+    - '{__name__="kueue_quota_reserved_wait_time_seconds_bucket", cluster_queue="cluster-pipeline-queue"}'
 
     ## ArgoCD Metrics
     - '{__name__="argocd_app_reconcile_bucket", namespace="gitops-service-argocd"}'
@@ -211,6 +217,7 @@
     - '{__name__="etcd_server_id", namespace="openshift-etcd"}'
     - '{__name__="etcd_server_quota_backend_bytes", namespace="openshift-etcd"}'
     - '{__name__="etcd_mvcc_db_total_size_in_bytes", namespace="openshift-etcd"}'
+    - '{__name__="etcd_mvcc_db_total_size_in_use_in_bytes", namespace="openshift-etcd"}'
     - '{__name__="etcd_server_received_total", namespace="openshift-etcd"}'
     - '{__name__="etcd_network_active_peers", namespace="openshift-etcd"}'
     - '{__name__="etcd_network_peer_round_trip_time_seconds_bucket"}'
@@ -242,6 +249,7 @@
     - '{__name__="kube_node_role"}'
     - '{__name__="kube_node_status_allocatable", resource=~"cpu|memory"}'
     - '{__name__="kube_node_status_condition", condition="MemoryPressure", status="true"}'
+    - '{__name__="kube_namespace_labels", label_konflux_ci_dev_type="tenant"}'
 
     ## Node Metrics
     - '{__name__="node_cpu_seconds_total", mode="idle"}'