arrow

GH-44071: [C++] Leak S3 structures if finalization happens too late (#44090)

### Rationale for this change

Leaking S3 structures at shutdown can be better than inducing a segfault because those structures' destructors run too late at process exit.

This seems to avoid the crash when run under `uwsgi` in https://github.com/apache/arrow/issues/44071

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Hopefully not.

* GitHub Issue: #44071

Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>