feat: move namespaces defs into apps and utilize fluxcd.io/prune label

Signed-off-by: Devin Buhl <devin@buhl.casa>

cluster/apps/networking/k8s-gateway/helm-release.yaml

@@ -15,6 +15,16 @@ spec:
         name: k8s-gateway
         namespace: flux-system
       interval: 5m
+  install:
+    createNamespace: true
+    remediation:
+      retries: 3
+  upgrade:
+    remediation:
+      retries: 3
+  dependsOn:
+    - name: metallb
+      namespace: networking
   values:
     fullnameOverride: k8s-gateway
     domain: ${SECRET_DOMAIN}
@@ -25,17 +35,3 @@ spec:
       annotations:
         metallb.universe.tf/loadBalancerIPs: "${METALLB_K8S_GATEWAY_ADDR}"
       externalTrafficPolicy: Local
-    # Increase replicaCount and set an anti-affinity if you wish to scale this
-    # replicaCount: 1
-    # affinity:
-    #   podAntiAffinity:
-    #     preferredDuringSchedulingIgnoredDuringExecution:
-    #       - weight: 100
-    #         podAffinityTerm:
-    #           labelSelector:
-    #             matchExpressions:
-    #               - key: app.kubernetes.io/name
-    #                 operator: In
-    #                 values:
-    #                   - k8s-gateway
-    #           topologyKey: kubernetes.io/hostname