metrics: Fix test name, move to gotest.tools

Signed-off-by: Christopher Crone <[email protected]>

metrics/metics_test.go → metrics/metrics_test.go

@@ -20,7 +20,7 @@ import (
 	"testing"
 
 	"github.com/spf13/cobra"
-	"github.com/stretchr/testify/assert"
+	"gotest.tools/v3/assert"
 )
 
 func TestFlag(t *testing.T) {