Move to use github.com/containerd/log

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

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

runtime/v2/shim/shim_unix.go

@@ -27,9 +27,9 @@ import (
 	"os/signal"
 	"syscall"
 
-	"github.com/containerd/containerd/log"
 	"github.com/containerd/containerd/sys/reaper"
 	"github.com/containerd/fifo"
+	"github.com/containerd/log"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
 )