[C++] Create a signal-safe self-pipe abstraction

[asfimport]

A signal-safe self-pipe is already used in the Flight server in order to shutdown the server on an incoming SIGINT.

We should refactor this to expose a reusable abstraction.

Reporter: Antoine Pitrou / @pitrou
Assignee: Antoine Pitrou / @pitrou

Related issues:

• [C++] Investigate spawning arbitrary callbacks from StopToken (is depended upon by)

PRs and other links:

• GitHub Pull Request #13354

_{Note: This issue was originally created as ARROW-16799. Please see the migration documentation for further details.}

[asfimport]

Yibo Cai / @cyb70289:
Issue resolved by pull request 13354
#13354