ContainerAttach integration tests flaking

[jsturtevant]

2023-09-27T16:54:46.0829155Z === CONT  TestContainerAttachProcess
2023-09-27T16:54:46.2301858Z     container_linux_test.go:716: write /proc/self/fd/29: broken pipe
2023-09-27T16:54:46.2314358Z     container_linux_test.go:724: write /proc/self/fd/29: broken pipe
2023-09-27T16:54:46.2384256Z     container_linux_test.go:746: expected output "hello\nhello\n" but received ""
2023-09-27T16:54:46.2591524Z --- FAIL: TestContainerAttachProcess (0.18s)
2023-09-27T16:54:46.2592190Z === CONT  TestContainerAttach
2023-09-27T16:54:46.3625257Z     container_linux_test.go:515: write /proc/self/fd/29: broken pipe
2023-09-27T16:54:46.3637557Z     container_linux_test.go:528: write /proc/self/fd/29: broken pipe
2023-09-27T16:54:46.3876891Z     container_linux_test.go:549: expected output "hello\nhello\n" but received ""
2023-09-27T16:54:46.3910662Z --- FAIL: TestContainerAttach (0.13s)

Occurrences:
https://github.com/containerd/rust-extensions/actions/runs/6328911110/job/17188102327?pr=206
#181 (comment)

[jsturtevant]

https://github.com/containerd/rust-extensions/actions/runs/6329201731/job/17192981485