Move to use github.com/containerd/log

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

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

snapshots/benchsuite/benchmark_test.go

@@ -32,12 +32,12 @@ import (
 	"github.com/containerd/continuity/fs/fstest"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/containerd/containerd/log"
 	"github.com/containerd/containerd/mount"
 	"github.com/containerd/containerd/snapshots"
 	"github.com/containerd/containerd/snapshots/devmapper"
 	"github.com/containerd/containerd/snapshots/native"
 	"github.com/containerd/containerd/snapshots/overlay"
+	"github.com/containerd/log"
 )
 
 var (