fix: remove duplicate wait keys from helm addon kustomizations

The repo-only Kustomization healthCheck change accidentally left the original
wait:true keys in the Rancher and Rancher backup Kustomizations, which broke
the infrastructure kustomize build. Remove the duplicate keys so Flux can
apply the HelmRelease-only health checks cleanly.

infrastructure/addons/kustomization-rancher-backup.yaml

@@ -10,7 +10,6 @@ spec:
     kind: GitRepository
     name: platform
   path: ./infrastructure/addons/rancher-backup
-  wait: true
   timeout: 10m
   suspend: false
   dependsOn:

infrastructure/addons/kustomization-rancher.yaml

@@ -10,7 +10,6 @@ spec:
     kind: GitRepository
     name: platform
   path: ./infrastructure/addons/rancher
-  wait: true
   timeout: 15m
   suspend: false
   dependsOn: