migrate to github.com/moby/sys/userns

Commit 8437c567d8 migrated the use of the
userns package to the github.com/moby/sys/user module.

After further discussion with maintainers, it was decided to move the
userns package to a separate module, as it has no direct relation with
"user" operations (other than having "user" in its name).

This patch migrates our code to use the new module.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

internal/cri/server/podsandbox/sandbox_run_linux.go

@@ -23,7 +23,7 @@ import (
 	"strings"
 
 	"github.com/containerd/containerd/v2/pkg/oci"
-	"github.com/moby/sys/user/userns"
+	"github.com/moby/sys/userns"
 	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
 	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/opencontainers/selinux/go-selinux"

internal/cri/server/podsandbox/sandbox_run_linux_test.go

@@ -22,7 +22,7 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/moby/sys/user/userns"
+	"github.com/moby/sys/userns"
 	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
 	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/opencontainers/selinux/go-selinux"

internal/cri/server/service_linux.go

@@ -19,7 +19,7 @@ package server
 import (
 	"fmt"
 
-	"github.com/moby/sys/user/userns"
+	"github.com/moby/sys/userns"
 	"github.com/opencontainers/selinux/go-selinux"
 	"tags.cncf.io/container-device-interface/pkg/cdi"