Move to use github.com/containerd/log

Add github.com/containerd/log to go.mod

Signed-off-by: Derek McGowan <derek@mcg.dev>

archive/tar_linux_test.go

@@ -25,12 +25,12 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/containerd/containerd/log/logtest"
 	"github.com/containerd/containerd/mount"
 	"github.com/containerd/containerd/pkg/testutil"
 	"github.com/containerd/containerd/snapshots/overlay/overlayutils"
 	"github.com/containerd/continuity/fs"
 	"github.com/containerd/continuity/fs/fstest"
+	"github.com/containerd/log/logtest"
 )
 
 func TestOverlayApply(t *testing.T) {