Move config version to version package

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

contrib/fuzz/daemon.go

@@ -27,6 +27,7 @@ import (
 	"github.com/containerd/containerd/v2/cmd/containerd/server/config"
 	"github.com/containerd/containerd/v2/defaults"
 	"github.com/containerd/containerd/v2/pkg/sys"
+	"github.com/containerd/containerd/v2/version"
 	"github.com/containerd/log"
 )
 
@@ -51,7 +52,7 @@ func startDaemon() {
 		defer close(errC)
 
 		srvconfig := &config.Config{
-			Version: config.CurrentConfigVersion,
+			Version: version.ConfigVersion,
 			Root:    defaultRoot,
 			State:   defaultState,
 			Debug: config.Debug{