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/proxy-rbac.yaml

@@ -0,0 +1,32 @@
+# Copyright (c) Tailscale Inc & AUTHORS
+# SPDX-License-Identifier: BSD-3-Clause
+
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: proxies
+  namespace: {{ .Release.Namespace }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: proxies
+  namespace: {{ .Release.Namespace }}
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: proxies
+  namespace: {{ .Release.Namespace }}
+subjects:
+- kind: ServiceAccount
+  name: proxies
+  namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: Role
+  name: proxies
+  apiGroup: rbac.authorization.k8s.io