[CI]: TestLogsWithoutNewlineOrEOF flaky

[apostasie]

Description

This is yet another log related test that fails randomly.

Steps to reproduce the issue

No response

Describe the results you received and expected

=== RUN   TestLogsWithoutNewlineOrEOF
=== PAUSE TestLogsWithoutNewlineOrEOF
=== CONT  TestLogsWithoutNewlineOrEOF
    container_logs_test.go:194: assertion failed: error is not nil: expected stdout to contain "Hello World!"
--- FAIL: TestLogsWithoutNewlineOrEOF (3.38s)
FAIL cmd/nerdctl/container.TestLogsWithoutNewli

What version of nerdctl are you using?

main

Are you using a variant of nerdctl? (e.g., Rancher Desktop)

None

Host information

No response

[apostasie]

@AkihiroSuda can you reopen this? (cannot do it myself apparently).

This just got spotted in https://github.com/containerd/nerdctl/actions/runs/15710306096/job/44266315074?pr=4290#step:10:2451