cmd/containerboot,kube: enable autoadvertisement of Tailscale services on containerboot (#18527)

* cmd/containerboot,kube/services: support the ability to automatically advertise services on startup

Updates #17769

Signed-off-by: chaosinthecrd <tom@tmlabs.co.uk>

* cmd/containerboot: don't assume we want to use kube state store if in kubernetes

Fixes #8188

Signed-off-by: chaosinthecrd <tom@tmlabs.co.uk>

---------

Signed-off-by: chaosinthecrd <tom@tmlabs.co.uk>

kube/localclient/local-client.go

@@ -17,6 +17,8 @@ import (
 // for easier testing.
 type LocalClient interface {
 	WatchIPNBus(ctx context.Context, mask ipn.NotifyWatchOpt) (IPNBusWatcher, error)
+	SetServeConfig(context.Context, *ipn.ServeConfig) error
+	EditPrefs(ctx context.Context, mp *ipn.MaskedPrefs) (*ipn.Prefs, error)
 	CertIssuer
 }
 
@@ -40,6 +42,14 @@ type localClient struct {
 	lc *local.Client
 }
 
+func (lc *localClient) SetServeConfig(ctx context.Context, config *ipn.ServeConfig) error {
+	return lc.lc.SetServeConfig(ctx, config)
+}
+
+func (lc *localClient) EditPrefs(ctx context.Context, mp *ipn.MaskedPrefs) (*ipn.Prefs, error) {
+	return lc.lc.EditPrefs(ctx, mp)
+}
+
 func (lc *localClient) WatchIPNBus(ctx context.Context, mask ipn.NotifyWatchOpt) (IPNBusWatcher, error) {
 	return lc.lc.WatchIPNBus(ctx, mask)
 }