using ks instead of chart

apps/coder/env/k3s-cluster/kustomization.yaml

@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+helmCharts:
+  - name: coder
+    repo: https://helm.coder.com/v2
+    version: 2.13.1
+    releaseName: coder
+    valuesFile: values.yaml