Updates MetalLB to install with kustomize instea of ks default.

infrastructure_setup/metallb/configuration/pool.yaml

@@ -0,0 +1,19 @@
+---
+apiVersion: metallb.io/v1beta1
+kind: IPAddressPool
+metadata:
+  name: first-pool
+  namespace: metallb-system
+spec:
+  addresses:
+  - PLACEHOLDER_CLUSTER_LOAD_BALANCER_RANGE
+
+---
+apiVersion: metallb.io/v1beta1
+kind: L2Advertisement
+metadata:
+  name: l2-advertisement
+  namespace: metallb-system
+spec:
+  ipAddressPools:
+  - first-pool