client/web: show features based on platform support

Hiding/disabling UI features when not available on the running
client.

Updates #10261

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>

ipn/ipnlocal/c2n.go

@@ -348,10 +348,9 @@ func (b *LocalBackend) newC2NUpdateResponse() tailcfg.C2NUpdateResponse {
 	// Note that we create the Updater solely to check for errors; we do not
 	// invoke it here. For this purpose, it is ok to pass it a zero Arguments.
 	prefs := b.Prefs().AutoUpdate()
-	_, err := clientupdate.NewUpdater(clientupdate.Arguments{ForAutoUpdate: true})
 	return tailcfg.C2NUpdateResponse{
 		Enabled:   envknob.AllowsRemoteUpdate() || prefs.Apply,
-		Supported: err == nil,
+		Supported: clientupdate.CanAutoUpdate(),
 	}
 }