Integrate Rosenpass (#1153)

This PR aims to integrate Rosenpass with NetBird. It adds a manager for Rosenpass that starts a Rosenpass server and handles the managed peers. It uses the cunicu/go-rosenpass implementation. Rosenpass will then negotiate a pre-shared key every 2 minutes and apply it to the wireguard connection.

The Feature can be enabled by setting a flag during the netbird up --enable-rosenpass command.

If two peers are both support and have the Rosenpass feature enabled they will create a post-quantum secure connection. If one of the peers or both don't have this feature enabled or are running an older version that does not have this feature yet, the NetBird client will fall back to a plain Wireguard connection without pre-shared keys for those connections (keeping Rosenpass negotiation for the rest).

Additionally, this PR includes an update of all Github Actions workflows to use go version 1.21.0 as this is a requirement for the integration.

---------

Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>

client/cmd/root.go

@@ -25,9 +25,10 @@ import (
 )
 
 const (
-	externalIPMapFlag  = "external-ip-map"
+	externalIPMapFlag   = "external-ip-map"
+	dnsResolverAddress  = "dns-resolver-address"
+	enableRosenpassFlag = "enable-rosenpass"
 	preSharedKeyFlag   = "preshared-key"
-	dnsResolverAddress = "dns-resolver-address"
 )
 
 var (
@@ -50,6 +51,7 @@ var (
 	preSharedKey            string
 	natExternalIPs          []string
 	customDNSAddress        string
+	rosenpassEnabled        bool
 	rootCmd                 = &cobra.Command{
 		Use:          "netbird",
 		Short:        "",
@@ -119,6 +121,7 @@ func init() {
 			`An empty string "" clears the previous configuration. `+
 			`E.g. --dns-resolver-address 127.0.0.1:5053 or --dns-resolver-address ""`,
 	)
+	upCmd.PersistentFlags().BoolVar(&rosenpassEnabled, enableRosenpassFlag, false, "[Experimental] Enable Rosenpass feature. If enabled, the connection will be post-quantum secured via Rosenpass.")
 }
 
 // SetupCloseHandler handles SIGTERM signal and exits with success