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GH-44695: [C++] Add S3 option to ignore SIGPIPE signals (#44735)

### Rationale for this change

Described in the added option docstring.

This is mostly convenience for people who don't want to install their own signal handler, though the SDK will also log incoming signals.

### Are these changes tested?

No, they are not reasonably testable.

### Are there any user-facing changes?

No.

* GitHub Issue: #44695

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