Cleanup magiconair usage from repo (#3276)

client/internal/peer/conn_status_test.go

@@ -1,8 +1,9 @@
 package peer
 
 import (
-	"github.com/magiconair/properties/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestConnStatus_String(t *testing.T) {

client/internal/peer/conn_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 
 	"github.com/netbirdio/netbird/client/iface"
 	"github.com/netbirdio/netbird/client/internal/peer/guard"