The name of the GID 65534 differs across distros.
("nogroup" on Debian derivatives, "nobody" on Red Hat derivatives)
Fix the following test failure:
```
=== RUN TestVolumeOwnership
volume_copy_up_test.go:103: Create a sandbox
main_test.go:667: Pull test image "ghcr.io/containerd/volume-ownership:2.1"
volume_copy_up_test.go:108: Create a container with volume-ownership test image
volume_copy_up_test.go:117: Start the container
volume_copy_up_test.go:125: Check ownership of test directory inside container
volume_copy_up_test.go:146: Check ownership of test directory on the host
volume_copy_up_test.go:153:
Error Trace: /root/go/src/github.com/containerd/containerd/volume_copy_up_test.go:153
Error: Not equal:
expected: "nobody:nogroup\n"
actual : "nobody:nobody\n"
Diff:
--- Expected
+++ Actual
@@ -1,2 +1,2 @@
-nobody:nogroup
+nobody:nobody
Test: TestVolumeOwnership
--- FAIL: TestVolumeOwnership (3.45s)
```
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>