cmd/k8s-operator: allow to install operator via helm (#9920)

Initial helm manifests.

Updates tailscale/tailscale#9222

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Co-authored-by: Maisem Ali <maisem@tailscale.com>

cmd/k8s-operator/deploy/chart/templates/apiserverproxy-rbac.yaml

@@ -0,0 +1,26 @@
+# Copyright (c) Tailscale Inc & AUTHORS
+# SPDX-License-Identifier: BSD-3-Clause
+
+{{ if eq .Values.apiServerProxyConfig.mode "true" }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: tailscale-auth-proxy
+rules:
+- apiGroups: [""]
+  resources: ["users", "groups"]
+  verbs: ["impersonate"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: tailscale-auth-proxy
+subjects:
+- kind: ServiceAccount
+  name: operator
+  namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: ClusterRole
+  name: tailscale-auth-proxy
+  apiGroup: rbac.authorization.k8s.io
+{{ end }}