[CI][C++] Build error in "AMD64 Debian C++23" appears as successful

[pitrou]

Describe the bug, including details regarding any error messages, version, and platform.

See https://github.com/apache/arrow/actions/runs/19297582780/job/55183342192?pr=48108#step:6:2386 : the Docker container fails, but the build is reported successful.

Component(s)

C++, Continuous Integration

[pitrou]

@kou

[raulcd]

This was discussed when the job was added, see the conversation here:
#47261 (comment)

The rationale was that developers not specifically working on C++ 23 compatibility should ignore the errors:

I want all developers except people who are working on C++23 support to ignore this error until we're C++23 ready.

[pitrou]

Ah, ok...