refactor: remove deprecated infrastructure kpis (#807)

## Changes

- Remove KPIs that are replaced by the project utilization kpis

Author: SoWieMarkus

helm/bundles/cortex-nova/templates/kpis.yaml

@@ -29,33 +29,6 @@ spec:
 ---
 apiVersion: cortex.cloud/v1alpha1
 kind: KPI
-metadata:
-  name: host-running-vms
-spec:
-  schedulingDomain: nova
-  impl: host_running_vms_kpi
-  dependencies:
-    knowledges:
-      - name: host-details
-      - name: host-utilization
-  description: |
-    This KPI tracks the total number of running VMs on hosts.
----
-apiVersion: cortex.cloud/v1alpha1
-kind: KPI
-metadata:
-  name: flavors-running-vms
-spec:
-  schedulingDomain: nova
-  impl: flavor_running_vms_kpi
-  dependencies:
-    datasources:
-      - name: nova-servers
-  description: |
-    This KPI tracks the total number of running VMs per flavor and availability zone.
----
-apiVersion: cortex.cloud/v1alpha1
-kind: KPI
 metadata:
   name: vm-migration-statistics
 spec: