Enable TestVolumeOwnership on Windows

This change enables the TestVolumeOwnership on Windows. The test
assumes that the volume-ownership image is built on Windows, thus
ensuring that Windows file security info (ACLs and ownership info)
are attached to the C:\volumes\test_dir path.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

integration/volume_copy_up_unix_test.go

@@ -0,0 +1,35 @@
+//go:build !windows
+// +build !windows
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package integration
+
+import (
+	"fmt"
+
+	exec "golang.org/x/sys/execabs"
+)
+
+func getVolumeHostPathOwnership(criRoot, containerID string) (string, error) {
+	hostCmd := fmt.Sprintf("find %s/containers/%s/volumes/* | xargs stat -c %%U:%%G", criRoot, containerID)
+	output, err := exec.Command("sh", "-c", hostCmd).CombinedOutput()
+	if err != nil {
+		return "", err
+	}
+	return string(output), nil
+}