events: allow use of AbortController with once

Allows an AbortSignal to be passed in to events.once() to cancel waiting on an event.

const ee = new EventEmitter();
const ac = new AbortController();

const p = events.once(ee, 'foo', { signal: ac.signal });

process.nextTick(() => ac.abort());

// p is rejected with an AbortError

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines