Remove istio from preview envs

Disable injection

Do some formatting

kube/template.yaml

@@ -1,3 +1,4 @@
+---
 - name: $ARGO_APP_BRANCH
   app: badhouseplants
   branch: $ARGO_APP_BRANCH
@@ -5,8 +6,10 @@
   chart_version: $ARGO_APP_CHART_VERSION
   repo_url: https://git.badhouseplants.net/api/packages/badhouseplants/helm
   value: |
-    namespace: 
+    namespace:
       name: badhouseplants-$ARGO_APP_BRANCH
+      labels:
+        istio-injection: disabled
     istio:
       hosts:
         - $ARGO_APP_HOSTNAME