Add 2025-004-monitoring

[matofeder]

This PR implements ITU monitoring according to dnation order 2025-004.

Enable ITU monitoring deployment in dnation-kubernetes-monitoring:

ITUMonitoring:
  enabled: true

ITU monitoring requires dnation-kubernetes-monitoring-stack to be deployed with openstack exporter and ssl exporter, example values:

prometheus-openstack-exporter:
  enabled: true
  commonLabels:
    release: monitoring
  serviceMonitor:
    scrapeTimeout: "1m"
  endpoint_type: "public"
  clouds_yaml_config: |
    clouds.yaml: |
        clouds:
          default:
            auth:
              auth_url: https://...
              application_credential_id: "..."
              application_credential_secret: "..."
            region_name: "..."
            interface: "public"
            identity_api_version: 3
            auth_type: "v3applicationcredential"

ssl-exporter:
  enabled: true
  serviceMonitor:
    enabled: true
    secretTargets:
   # ITU Cluster namespace
     - "yaook/*"

Dashboards preview:
ITU L0

ITU L1

ITU L2