feat: added prometheus and grafana chart configuration

kubernetes/helm/openslice/Chart.yaml

kubernetes/helm/openslice/templates/artemis.yaml

kubernetes/helm/openslice/templates/blockdiag.yaml

kubernetes/helm/openslice/templates/bugzilla.yaml

kubernetes/helm/openslice/templates/centrallog.yaml

kubernetes/helm/openslice/templates/cridge-secret.yaml

kubernetes/helm/openslice/templates/cridge.yaml

kubernetes/helm/openslice/templates/keycloak-config.yaml

kubernetes/helm/openslice/templates/keycloak.yaml

kubernetes/helm/openslice/templates/kroki-ingress.yaml

kubernetes/helm/openslice/templates/kroki.yaml

kubernetes/helm/openslice/templates/manoclient.yaml

kubernetes/helm/openslice/templates/metrico.yaml

kubernetes/helm/openslice/templates/mysql-config.yaml

kubernetes/helm/openslice/templates/mysql-pv-pvc.yaml

kubernetes/helm/openslice/templates/mysql.yaml

kubernetes/helm/openslice/templates/oasapi.yaml

kubernetes/helm/openslice/templates/openslice-ingress.yaml

kubernetes/helm/openslice/templates/osom.yaml

kubernetes/helm/openslice/templates/osportalapi-pv-pvc.yaml