NETOBSERV-1017: pods/services bandwidth (#523)

Provide sample FlowMetrics files to get top pods/services bandwidth
The metrics can be queried with:

- Pods incoming: topk(10, sum(rate(netobserv_pod_incoming_bytes_total[1m])) by (DstK8S_Name, DstK8S_Namespace))
- Pods outgoing: topk(10, sum(rate(netobserv_pod_outgoing_bytes_total[1m])) by (SrcK8S_Name, SrcK8S_Namespace))
- Services incoming: topk(10, sum(rate(netobserv_service_incoming_bytes_total[1m])) by (DstK8S_Name, DstK8S_Namespace))

config/samples/flowmetrics/pods_incoming_bytes.yaml

@@ -0,0 +1,13 @@
+apiVersion: flows.netobserv.io/v1alpha1
+kind: FlowMetric
+metadata:
+  name: flowmetric-pod-incoming
+spec:
+  metricName: pod_incoming_bytes_total
+  type: Counter
+  valueField: Bytes
+  direction: Ingress
+  labels: [DstK8S_Name,DstK8S_Namespace,DstK8S_OwnerName,DstK8S_OwnerType,DstK8S_HostName]
+  filters:
+  - field: DstK8S_Type
+    value: Pod

config/samples/flowmetrics/pods_outgoing_bytes.yaml

@@ -0,0 +1,13 @@
+apiVersion: flows.netobserv.io/v1alpha1
+kind: FlowMetric
+metadata:
+  name: flowmetric-pod-outgoing
+spec:
+  metricName: pod_outgoing_bytes_total
+  type: Counter
+  valueField: Bytes
+  direction: Egress
+  labels: [SrcK8S_Name,SrcK8S_Namespace,SrcK8S_OwnerName,SrcK8S_OwnerType,SrcK8S_HostName]
+  filters:
+  - field: SrcK8S_Type
+    value: Pod

config/samples/flowmetrics/services_incoming_bytes.yaml

@@ -0,0 +1,14 @@
+apiVersion: flows.netobserv.io/v1alpha1
+kind: FlowMetric
+metadata:
+  name: flowmetric-service-incoming
+spec:
+  metricName: service_incoming_bytes_total
+  type: Counter
+  valueField: Bytes
+  # Note that we need to look from the sender point of view to get traffic to services, hence Egress here
+  direction: Egress
+  labels: [DstK8S_Name,DstK8S_Namespace,DstK8S_OwnerName,DstK8S_OwnerType,DstK8S_HostName]
+  filters:
+  - field: DstK8S_Type
+    value: Service