Move errdefs to pkg/errdefs

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

cmd/containerd-shim-runc-v2/process/exec.go

@@ -31,7 +31,7 @@ import (
 	"golang.org/x/sys/unix"
 
 	"github.com/containerd/console"
-	"github.com/containerd/containerd/v2/errdefs"
+	"github.com/containerd/containerd/v2/pkg/errdefs"
 	"github.com/containerd/containerd/v2/pkg/stdio"
 	"github.com/containerd/fifo"
 	runc "github.com/containerd/go-runc"