refactor!: remove MetalLB

Replaced by Cilium L2 Aware LB.

Additionally, the default Zerotier route was changed to match the
LB IP pool rather than the entire home subnet. This makes it easier
to manage in the configure script and can be updated to any value
later if needed.

system/metallb-system/Chart.yaml

@@ -1,7 +0,0 @@
-apiVersion: v2
-name: metallb
-version: 0.0.0
-dependencies:
-  - name: metallb
-    version: 0.13.9
-    repository: https://metallb.github.io/metallb

system/metallb-system/templates/ipaddresspool.yaml

@@ -1,8 +0,0 @@
-apiVersion: metallb.io/v1beta1
-kind: IPAddressPool
-metadata:
-  name: default
-  namespace: {{ .Release.Namespace }}
-spec:
-  addresses:
-    - 192.168.1.224/27

system/metallb-system/templates/l2advertisement.yaml

@@ -1,8 +0,0 @@
-apiVersion: metallb.io/v1beta1
-kind: L2Advertisement
-metadata:
-  name: default
-  namespace: {{ .Release.Namespace }}
-spec:
-  ipAddressPools:
-    - default

system/metallb-system/values.yaml

@@ -1,2 +0,0 @@
-metallb:
-  existingConfigMap: metallb-config